Revert project change

Author: ncave

src/fsharp/FSharp.Compiler.Service.ProjectCrackerTool/FSharp.Compiler.Service.ProjectCrackerTool.fsproj

@@ -66,9 +66,15 @@
     <Reference Include="Microsoft.Build.Engine" Condition=" '$(TargetFrameworkVersion)' == 'v4.0'" />
     <Reference Include="Microsoft.Build" Condition=" '$(TargetFrameworkVersion)' == 'v4.0'" />
     <Reference Include="Microsoft.Build.Utilities.v4.0" Condition=" '$(TargetFrameworkVersion)' == 'v4.0'" />
-    <Reference Include="Microsoft.Build.Framework" Condition=" '$(TargetFrameworkVersion)' == 'v4.5'" />
-    <Reference Include="Microsoft.Build.Engine" Condition=" '$(TargetFrameworkVersion)' == 'v4.5'" />
-    <Reference Include="Microsoft.Build" Condition=" '$(TargetFrameworkVersion)' == 'v4.5'" />
+    <Reference Include="Microsoft.Build.Framework, Version=12.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" Condition=" '$(TargetFrameworkVersion)' == 'v4.5'">
+      <SpecificVersion>True</SpecificVersion>
+    </Reference>
+    <Reference Include="Microsoft.Build.Engine, Version=12.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" Condition=" '$(TargetFrameworkVersion)' == 'v4.5'">
+      <SpecificVersion>True</SpecificVersion>
+    </Reference>
+    <Reference Include="Microsoft.Build, Version=12.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" Condition=" '$(TargetFrameworkVersion)' == 'v4.5'">
+      <SpecificVersion>True</SpecificVersion>
+    </Reference>
     <Reference Include="Microsoft.Build.Utilities.v12.0" Condition=" '$(TargetFrameworkVersion)' == 'v4.5'" />
     <Reference Include="mscorlib" />
     <Reference Include="FSharp.Core, Version=$(TargetFSharpCoreVersion), Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">