libretro: Added Mr.Boom libretro core

pkgs/applications/emulators/retroarch/cores.nix

@@ -641,6 +641,15 @@ in
     };
   };
 
+  mrboom = mkLibretroCore {
+    core = "mrboom";
+    makefile = "Makefile";
+    meta = {
+      description = "Port of Mr.Boom to libretro";
+      license = lib.licenses.mit;
+    };
+  };
+
   mupen64plus = mkLibretroCore {
     core = "mupen64plus-next";
     src = getCoreSrc "mupen64plus";

pkgs/applications/emulators/retroarch/hashes.json

@@ -307,6 +307,13 @@
         "rev": "314bf7b676f5b820f396209eb0c7d6fbe8103486",
         "hash": "sha256-Rk+glDgSa1J1IIe5NrJElX9zr59+LQynfDXuHWyZcEM="
     },
+    "mrboom": {
+        "owner": "Javanaise",
+        "repo": "mrboom-libretro",
+        "rev": "c4ec620424fe79f0d6db719d73628f23ae285ada",
+        "hash": "sha256-twocTyayV79a4757Yfoz/P3wnQPgiwsbrBbLmT4EZKQ=",
+        "fetchSubmodules": true
+    },
     "mupen64plus": {
         "owner": "libretro",
         "repo": "mupen64plus-libretro-nx",

pkgs/applications/emulators/retroarch/update_cores.py

@@ -62,6 +62,7 @@ CORES = {
     "mesen": {"repo": "mesen"},
     "mesen-s": {"repo": "mesen-s"},
     "meteor": {"repo": "meteor-libretro"},
+    "mrboom": {"repo": "mrboom-libretro", "owner": "Javanaise", "fetch_submodules": True},
     "mgba": {"repo": "mgba"},
     "mupen64plus": {"repo": "mupen64plus-libretro-nx"},
     "neocd": {"repo": "neocd_libretro"},