Migrate clang-format-vs plugin project to VS 2013

The plugin still works fine in versions starting from 2010,
but this was needed to make the project _build_ in VS 2013, which
is the blessed version for building LLVM projects these days.

http://reviews.llvm.org/D8021

llvm-svn: 231084

Author: zmodem

clang/tools/clang-format-vs/ClangFormat/ClangFormat.csproj

@@ -14,7 +14,7 @@
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>Key.snk</AssemblyOriginatorKeyFile>
     <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
-    <MinimumVisualStudioVersion>11.0</MinimumVisualStudioVersion>
+    <MinimumVisualStudioVersion>12.0</MinimumVisualStudioVersion>
     <FileUpgradeFlags>
     </FileUpgradeFlags>
     <UpgradeBackupLocation>
@@ -219,9 +219,7 @@
   <Import Project="$(VSToolsPath)\VSSDK\Microsoft.VsSDK.targets" Condition="'$(VSToolsPath)' != ''" />
   <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v10.0\VSSDK\Microsoft.VsSDK.targets" Condition="false" />
   <PropertyGroup>
-    <PreBuildEvent>if not exist $(ProjectDir)Key.snk (
-  "$(FrameworkSDKDir)Bin\NETFX 4.0 Tools\sn.exe" -k $(ProjectDir)Key.snk
-)</PreBuildEvent>
+    <PreBuildEvent>if not exist $(ProjectDir)Key.snk ("$(FrameworkSDKDir)Bin\NETFX 4.5.1 Tools\sn.exe" -k $(ProjectDir)Key.snk)</PreBuildEvent>
   </PropertyGroup>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.