Add TargetPlatformMinVersion to winrt props.

Author: Sibras

templates/smp_winrt_deps.props

@@ -63,6 +63,7 @@
     <ApplicationTypeRevision Condition="'$(VisualStudioVersion)' == '12.0'">8.1</ApplicationTypeRevision>
     <WindowsTargetPlatformVersion Condition="'$(ApplicationTypeRevision)|$(WindowsTargetPlatformVersion)' == '10.0|'">10.0.10240.0</WindowsTargetPlatformVersion>
     <WindowsTargetPlatformMinVersion Condition="'$(ApplicationTypeRevision)' == '10.0'">10.0.10240.0</WindowsTargetPlatformMinVersion>
+    <TargetPlatformMinVersion Condition="'$(ApplicationTypeRevision)' == '10.0'">10.0.10240.0</TargetPlatformMinVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='DebugWinRT|Win32'" Label="Configuration">