chore: point each xavix ref at its own set

profile_sync flagged five refs in src/mame/tvgames/xavix.cpp. Checking
each entry against the line that declares its own set showed nineteen
were wrong, the whole e-kara and XaviX family: ekara cited 2956 where
the pinned revision declares it at 2878. The fourteen the tool passed
were relocatable by content, so they anchored somewhere plausible; that
is drift detection working, and it is weaker than asking whether the
cited line declares the set the entry names.

Every ref now names the CONS line of its own set at the pinned
revision, checked by matching the set name on that line rather than by
anchoring.

emulators/mamemess.yml

@@ -251,7 +251,7 @@ files:
   - name: ekara.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2956"
+    source_ref: "src/mame/tvgames/xavix.cpp:2878"
     contents:
       - name: ekara.bin
         size: 1048576
@@ -261,7 +261,7 @@ files:
   - name: ekaraa.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2905"
+    source_ref: "src/mame/tvgames/xavix.cpp:2879"
     contents:
       - name: ekara2.bin
         size: 1048576
@@ -271,7 +271,7 @@ files:
   - name: ekaraj.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2906"
+    source_ref: "src/mame/tvgames/xavix.cpp:2880"
     contents:
       - name: ekarajapan.bin
         size: 1048576
@@ -281,7 +281,7 @@ files:
   - name: ekarag.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2959"
+    source_ref: "src/mame/tvgames/xavix.cpp:2881"
     contents:
       - name: ekaragermany.bin
         size: 2097152
@@ -291,7 +291,7 @@ files:
   - name: ekaras.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2908"
+    source_ref: "src/mame/tvgames/xavix.cpp:2882"
     contents:
       - name: ekaraspanish.bin
         size: 2097152
@@ -301,7 +301,7 @@ files:
   - name: isinger.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2962"
+    source_ref: "src/mame/tvgames/xavix.cpp:2884"
     contents:
       - name: kr_isinger.bin
         size: 1048576
@@ -311,7 +311,7 @@ files:
   - name: ekaraphs.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2965"
+    source_ref: "src/mame/tvgames/xavix.cpp:2887"
     contents:
       - name: ekaraheadset.bin
         size: 2097152
@@ -321,7 +321,7 @@ files:
   - name: epitch.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:3028"
+    source_ref: "src/mame/tvgames/xavix.cpp:2890"
     contents:
       - name: ekarajapan.bin
         size: 1048576
@@ -331,7 +331,7 @@ files:
   - name: ekaramix.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2919"
+    source_ref: "src/mame/tvgames/xavix.cpp:2893"
     contents:
       - name: ekaramix.bin
         size: 2097152
@@ -342,7 +342,7 @@ files:
   - name: ddrfammt.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2922"
+    source_ref: "src/mame/tvgames/xavix.cpp:2896"
     contents:
       - name: ekara_ddr_ha010_81947.bin
         size: 2097152
@@ -352,7 +352,7 @@ files:
   - name: popira.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2936"
+    source_ref: "src/mame/tvgames/xavix.cpp:2899"
     contents:
       - name: popira.bin
         size: 1048576
@@ -362,7 +362,7 @@ files:
   - name: popirak.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2927"
+    source_ref: "src/mame/tvgames/xavix.cpp:2901"
     contents:
       - name: kr_main.u2
         size: 1048576
@@ -372,7 +372,7 @@ files:
   - name: popira2.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2930"
+    source_ref: "src/mame/tvgames/xavix.cpp:2904"
     contents:
       - name: popira2.bin
         size: 2097152
@@ -382,7 +382,7 @@ files:
   - name: taikodp.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2933"
+    source_ref: "src/mame/tvgames/xavix.cpp:2907"
     contents:
       - name: taikodepopira.bin
         size: 2097152
@@ -392,7 +392,7 @@ files:
   - name: jpopira.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2936"
+    source_ref: "src/mame/tvgames/xavix.cpp:2910"
     contents:
       - name: jumpingpopira.bin
         size: 2097152
@@ -406,7 +406,7 @@ files:
   - name: evio.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2966"
+    source_ref: "src/mame/tvgames/xavix.cpp:2913"
     contents:
       - name: evio.bin
         size: 2097152
@@ -416,7 +416,7 @@ files:
   - name: tak_daig.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2944"
+    source_ref: "src/mame/tvgames/xavix.cpp:2918"
     contents:
       - name: robottransformer_unit.bin
         size: 2097152
@@ -426,7 +426,7 @@ files:
   - name: gcslottv.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2946"
+    source_ref: "src/mame/tvgames/xavix.cpp:2920"
     contents:
       - name: sammyslotunit.bin
         size: 2097152
@@ -436,7 +436,7 @@ files:
   - name: hikara.zip
     required: true
     category: bios_zip
-    source_ref: "src/mame/tvgames/xavix.cpp:2951"
+    source_ref: "src/mame/tvgames/xavix.cpp:2925"
     contents:
       - name: hikara.u3
         size: 1048576