VideoBackends: Add AbstractShader and AbstractPipeline classes

Source/Core/VideoBackends/OGL/OGL.vcxproj

@@ -36,6 +36,8 @@
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <ItemGroup>
+    <ClCompile Include="OGLPipeline.cpp" />
+    <ClCompile Include="OGLShader.cpp" />
     <ClCompile Include="OGLTexture.cpp" />
     <ClCompile Include="BoundingBox.cpp" />
     <ClCompile Include="FramebufferManager.cpp" />
@@ -53,6 +55,8 @@
     <ClCompile Include="VertexManager.cpp" />
   </ItemGroup>
   <ItemGroup>
+    <ClInclude Include="OGLPipeline.h" />
+    <ClInclude Include="OGLShader.h" />
     <ClInclude Include="OGLTexture.h" />
     <ClInclude Include="BoundingBox.h" />
     <ClInclude Include="FramebufferManager.h" />