Add .gitlab-ci.yml

.gitlab-ci.yml

+.core-defs:
+  variables:
+    JNI_PATH: libretro
+    CORENAME: hatari
+
+include:
+  - template: Jobs/Code-Quality.gitlab-ci.yml
+  - project: 'libretro-infrastructure/ci-templates'
+    file: '/vita-static.yml'
+  - project: 'libretro-infrastructure/ci-templates'
+    file: '/linux-x64.yml'
+  - project: 'libretro-infrastructure/ci-templates'
+    file: '/windows-x64-mingw.yml'
+  - project: 'libretro-infrastructure/ci-templates'
+    file: '/android-jni.yml'
+
+stages:
+  - build-prepare
+  - build-shared
+  - build-static
+  - test
+
+#Desktop
+libretro-build-linux-x64:
+  extends:
+    - .core-defs
+    - .libretro-linux-x64-make-default
+  variables:
+    MAKEFILE: Makefile.libretro
+
+libretro-build-windows-x64:
+  extends:
+    - .core-defs
+    - .libretro-windows-x64-mingw-make-default
+  variables:
+    MAKEFILE: Makefile.libretro
+    
+# Android
+android-armeabi-v7a:
+  extends:
+    - .core-defs
+    - .libretro-android-jni-armeabi-v7a
+
+android-arm64-v8a:
+  extends:
+    - .core-defs
+    - .libretro-android-jni-arm64-v8a
+
+android-x86_64:
+  extends:
+    - .core-defs
+    - .libretro-android-jni-x86_64
+    
+android-x86:
+  extends:
+    - .core-defs
+    - .libretro-android-jni-x86
+
+# Static
+libretro-build-vita:
+  extends:
+    - .core-defs
+    - .libretro-vita-static-retroarch-master
+  variables:
+    MAKEFILE: Makefile.libretro