fix build 4

Author: dsyme

samples/FsiExe/FsiExe.fsproj

@@ -77,6 +77,7 @@
   <Target Name="BeforeBuild">
     <Copy SourceFiles="$(MSBuildExtensionsPath32)\..\Reference Assemblies\Microsoft\FSharp\.NETFramework\v4.0\$(TargetFSharpCoreVersion)\FSharp.Core.sigdata" DestinationFolder="$(OutputPath)" Condition="Exists('$(MSBuildExtensionsPath32)\..\Reference Assemblies\Microsoft\FSharp\.NETFramework\v4.0\$(TargetFSharpCoreVersion)\FSharp.Core.sigdata')" />
     <Copy SourceFiles="$(MSBuildExtensionsPath32)\..\Reference Assemblies\Microsoft\FSharp\.NETFramework\v4.0\$(TargetFSharpCoreVersion)\FSharp.Core.optdata" DestinationFolder="$(OutputPath)" Condition="Exists('$(MSBuildExtensionsPath32)\..\Reference Assemblies\Microsoft\FSharp\.NETFramework\v4.0\$(TargetFSharpCoreVersion)\FSharp.Core.optdata')" />
+    <Copy SourceFiles="$(MSBuildExtensionsPath32)\..\lib\mono\4.5\FSharp.Core.dll" DestinationFolder="$(OutputPath)" Condition="Exists('$(MSBuildExtensionsPath32)\..\lib\mono\4.5\FSharp.Core.dll')" />
     <Copy SourceFiles="$(MSBuildExtensionsPath32)\..\lib\mono\4.5\FSharp.Core.sigdata" DestinationFolder="$(OutputPath)" Condition="Exists('$(MSBuildExtensionsPath32)\..\lib\mono\4.5\FSharp.Core.sigdata')" />
     <Copy SourceFiles="$(MSBuildExtensionsPath32)\..\lib\mono\4.5\FSharp.Core.optdata" DestinationFolder="$(OutputPath)" Condition="Exists('$(MSBuildExtensionsPath32)\..\lib\mono\4.5\FSharp.Core.optdata')"  />
   </Target>