feat: name elec and knulli builds in profiles

EmuELEC, AmberELEC and KNULLI launch standalone emulators by the name
their launch code dispatches on (HATARISA, PPSSPPSDL, FBNEOSA) and ship
32-bit or patched builds of libretro cores under their own .so names
(flycast_32b, mupen64plus_next_alt, genesis_plus_gx_cart_special,
mame0139, flycast-xtreme). Each name joins the profile of the project
its package builds. fceumm_mod reads gg.rom, not gamegenie.nes, and
never opens it, so it gets its own profile.

emulators/stella.yml

@@ -8,6 +8,7 @@ core_version: "8.0_pre"
 display_name: "Atari - 2600 (Stella)"
 cores:
   - stella
+  - "STELLASA"
 systems:
   - atari-2600