chore: map rocknix and retropie core names

ROCKNIX names its standalone packages <emu>-sa (package.mk under
projects/ROCKNIX/packages/emulators/standalone at 20261001); RetroPie
names its libretro scriptmodules lr-<name>. Each name joins the profile
of the project its package builds. supermodel-sa builds
DirtBagXon/model3emu-code-sinden, the supermodel3 profile.

emulators/drastic.yml

@@ -12,6 +12,7 @@ core_version: "r2.6.0.4a"
 display_name: "Nintendo - DS (DraStic)"
 cores:
   - drastic
+  - "drastic-sa"
 systems:
   - nintendo-ds
 mode: standalone