Add libnx compilation directives

.gitlab-ci.yml

@@ -64,6 +64,10 @@ include:
   #- project: 'libretro-infrastructure/ci-templates'
     #file: '/wii-static.yml'
   
+  # Nintendo Switch
+  - project: 'libretro-infrastructure/ci-templates'
+    file: '/libnx-static.yml'
+
   # tvOS (AppleTV)
   - project: 'libretro-infrastructure/ci-templates'
     file: '/tvos-arm64.yml'
@@ -183,7 +187,13 @@ libretro-build-tvos-arm64:
   #extends:
     #- .libretro-wii-static-retroarch-master
     #- .core-defs
-    
+
+# Nintendo Switch
+libretro-build-libnx-aarch64:
+  extends:
+    - .libretro-libnx-static-retroarch-master
+    - .core-defs
+
 # PlayStation Vita
 libretro-build-vita:
   extends: