fix: map RetroPie's standalone builds to profiles

RetroPie builds minivmac/minivmac, winterheart/quasi88 and TurtleBazooka/px68k under the package names minivmac, quasi88 and px68k (scriptmodules/emulators/minivmac.sh:12, quasi88.sh:12, px68k.sh:12). With built_by retropie and those names in cores, RetroPie resolves them to minivmac37, quasi88kai and px68k-sdl, while its libretro builds stay reached through retroarch. Measured: RetroPie keeps 532 of 532 platform files OK and gains the 14 files the standalone builds read; no other platform's resolution changes.

emulators/minivmac37.yml

@@ -7,7 +7,8 @@ source_commit: "6860a9a7f372c461b25dc42974b191a453ebcfb2"
 core_version: "37.03"
 display_name: "Apple - Macintosh Plus (Mini vMac 37)"
 mode: standalone
-cores: []
+cores: ["minivmac"]
+built_by: [retropie]
 systems:
   - apple-macintosh
 

emulators/px68k-sdl.yml

@@ -7,7 +7,8 @@ source_commit: "e29ce400a030aea29b447757eeb28fef7a0c493e"
 core_version: "0.15+K"
 display_name: "Sharp - X68000 (px68k SDL)"
 mode: standalone
-cores: []
+cores: ["px68k"]
+built_by: [retropie]
 systems:
   - sharp-x68000
 

emulators/quasi88kai.yml

@@ -7,7 +7,8 @@ source_commit: "0d4e171415cad7ac19ae4ff0dcf8cdcfd825947b"
 core_version: "0.7.1"
 display_name: "NEC - PC-8800 series (QUASI88kai)"
 mode: standalone
-cores: []
+cores: ["quasi88"]
+built_by: [retropie]
 systems:
   - nec-pc-88
   - nec-pc-80