chore: mark three cores as recalbox builds

eightyone, exel-hence and sugarbox2 live in Recalbox's own package repos
and no other platform ships them. eightyone's pin v1.2 is the tag Recalbox
10.1.1 builds while v1.3 is out, so it is held; exel-hence is held on v0.9.
sugarbox2's built tag v1.5 is token-gated and stays on the public v0.9.

emulators/eightyone.yml

@@ -6,8 +6,10 @@ upstream: "https://github.com/charlierobson/EightyOne"
 profiled_date: "2026-10-17"
 source_commit: "39ea0cc26453f4026458cfff62f10223a6bb1724"
 core_version: "v1.2"
+pin_frozen: "Recalbox, the only platform that ships this core, builds its tag v1.2 (Recalbox package/libretro-eightyone/libretro-eightyone.mk:8 at tag 10.1.1)."
 display_name: "Sinclair - ZX81 / ZX Spectrum (EightyOne, Recalbox)"
 cores: ["eightyone"]
+built_by: [recalbox]
 systems:
   - sinclair-zx81
   - sinclair-zx80

emulators/exel-hence.yml

@@ -6,9 +6,11 @@ upstream: "https://gitlab.com/recalbox/packages/recalbox-cores/libretro-exel-hen
 profiled_date: "2026-10-17"
 source_commit: "213328332cbfd8121e018493443e223a7a780961"
 core_version: "v0.9"
+pin_frozen: "Recalbox, the only platform that ships this core, builds its tag v0.9 (Recalbox package/libretro-exel-hence/libretro-exel-hence.mk:9 at tag 10.1.1)."
 display_name: "Exelvision - EXL 100 (Exel-Hence)"
 cores:
   - "exel-hence"
+built_by: [recalbox]
 systems:
   - "exelvision-exl100"
 

emulators/sugarbox2.yml

@@ -9,6 +9,7 @@ core_version: "v0.9"
 display_name: "Amstrad - CPC / GX4000 (Sugarbox2)"
 cores:
   - "sugarbox2"
+built_by: [recalbox]
 systems:
   - "amstrad-cpc"