Added pragma for invalid xml doc targets, and added /doc option to uwp winrt build (#149)

Build/Microsoft.Xbox.Services.140.UWP.WinRT/Microsoft.Xbox.Services.140.UWP.WinRT.vcxproj

@@ -124,6 +124,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)'=='Debug'">
     <ClCompile>
       <PreprocessorDefinitions>_WINRT_DLL;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <GenerateXMLDocumentationFiles Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</GenerateXMLDocumentationFiles>
     </ClCompile>
     <Link>
       <GenerateDebugInformation>Debug</GenerateDebugInformation>

Source/Services/Common/pch_common.h

@@ -5,6 +5,7 @@
 
 #pragma warning(disable: 4503) // C4503: decorated name length exceeded, name was truncated  
 #pragma warning(disable: 4242) 
+#pragma warning(disable: 4634) // C4634: Discarding XML document comment for invalid target.
 
 #ifdef _WIN32
 // If you wish to build your application for a previous Windows platform, include WinSDKVer.h and