add initial gitlab-ci.yml

.gitlab-ci.yml

+stages:
+    - build
+
+build-libvlcsharp:
+    stage: build
+    tags:
+        - mac
+        - xamarin
+    script:
+        - msbuild LibVLCSharp/LibVLCSharp.csproj /t:restore,clean,build /p:Configuration=Release
+        
+build-libvlcsharp-forms:
+    stage: build
+    tags:
+        - mac
+        - xamarin
+    script:
+        - msbuild LibVLCSharp.Forms/LibVLCSharp.Forms.csproj /t:restore,clean,build /p:Configuration=Release
+
+build-libvlcsharp-samples:
+  stage: build
+  tags:
+      - mac
+      - xamarin
+  script:
+      - nuget restore LibVLCSharp.sln
+      - msbuild Samples/LibVLCSharp.Android.Sample/LibVLCSharp.Android.Sample.csproj /t:restore,clean,build /p:Configuration=Release
+      - msbuild Samples/LibVLCSharp.FSharp.Sample/LibVLCSharp.FSharp.Sample.fsproj /t:restore,clean,build /p:Configuration=Release
+      - msbuild Samples/LibVLCSharp.Mac.Sample/LibVLCSharp.Mac.Sample.csproj /t:restore,clean,build /p:Configuration=Release
+      - msbuild Samples/LibVLCSharp.NetCore.Sample/LibVLCSharp.NetCore.Sample.csproj /t:restore,clean,build /p:Configuration=Release
+      - msbuild Samples/LibVLCSharp.iOS.Sample/LibVLCSharp.iOS.Sample.csproj /t:restore,clean,build /p:Configuration=Release
+      
+build-libvlcsharp-forms-samples:
+  stage: build
+  tags:
+      - mac
+      - xamarin
+  script:
+      - nuget restore LibVLCSharp.Forms.Sample.sln
+      - msbuild Samples/Forms/LibVLCSharp.Forms.Sample/LibVLCSharp.Forms.Sample.csproj /t:restore,clean,build /p:Configuration=Release
+      - msbuild Samples/Forms/LibVLCSharp.Forms.Sample.Android/LibVLCSharp.Forms.Sample.Android.csproj /t:restore,clean,build /p:Configuration=Release
+      - msbuild Samples/Forms/LibVLCSharp.Forms.Sample.Mac/LibVLCSharp.Forms.Sample.Mac.csproj /t:restore,clean,build /p:Configuration=Release
+      - msbuild Samples/Forms/LibVLCSharp.Forms.Sample.iOS/LibVLCSharp.Forms.Sample.iOS.csproj /t:restore,clean,build /p:Configuration=Release
\ No newline at end of file