add steps for nuget signing

Author: LyubkaNikolova

BuildTools/BuildNuget.UWP.proj

@@ -7,6 +7,7 @@
         <NugetDependsOn>
             PrepareNugetProperties;
             BuildFullNugets
+            SignFullNugets
         </NugetDependsOn>
     </PropertyGroup>
 
@@ -50,5 +51,17 @@
 	<Exec Command="$(PowerShellExe) -NonInteractive -executionpolicy Unrestricted  -command (New-Object System.Net.WebClient).DownloadFile('http://dist.nuget.org/win-x86-commandline/latest/nuget.exe', 'nuget.exe')"/>
         <Exec Command="$(Nuget32ToolPath) pack $(UWPNuspec) -Version $(Version) -OutputDirectory $(FullOutputDir) -Properties $(UWPProperties)"/>
     </Target>
+  
+<Target Name="SignFullNugets">
+  <ItemGroup>
+      <NugetPackagesToBeSigned Include="$(FullOutputDir)\**\*.nupkg"/>
+    </ItemGroup>
+    
+    <Message Text="DEBUG INFO: SignNugetProject=$(SignNugetProject)" />
+
+    <MSBuild Projects="$(SignNugetProject)"
+             Properties="NugetToolPath=$(Nuget32ToolPath);
+                         SignedFilePath=%(NugetPackagesToBeSigned.FullPath)"/>
+</Target>
 
 	</Project>

BuildTools/Config.UWP.proj

@@ -10,6 +10,7 @@
     <ControlsFolder>$(MsBuildProjectDirectory)\..\Controls</ControlsFolder>
     <UWPControlsSolutionPath>$(ControlsFolder)\UWPControls.sln</UWPControlsSolutionPath>
     <UWPMapSolutionPath>$(ControlsFolder)\UWPMap.sln</UWPMapSolutionPath>
+    <SignNugetProject>$(MSBuildProjectDirectory)\CommonTools\SignNugetPackages.proj</SignNugetProject>
     <Configuration>Release</Configuration>
     <AnyCPUPlatform>Any CPU</AnyCPUPlatform>
     <X86Platform>x86</X86Platform>