fix build for .Net 4.5 conversion

Author: RubenWillems

project/MSBuildLogger/MSBuildLogger.csproj

@@ -58,7 +58,7 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="Microsoft.Build.Framework" />
-    <Reference Include="Microsoft.Build.Utilities" />
+    <Reference Include="Microsoft.Build.Utilities.v4.0" />
     <Reference Include="System" />
     <Reference Include="System.Core">
       <RequiredTargetFramework>3.5</RequiredTargetFramework>