Update MSBuild.sln for MSBuildTaskHost (#2489)
Update MSBuild.sln for MSBuildTaskHost (#2489)

This change just updates the version of Visual Studio and maps AnyCPU for MSBuildTaskHost to x86 which is disabled anyway.
chipitsine/msbuild,rainersigwald/msbuild,cdmihai/msbuild,AndyGerlicher/msbuild,mono/msbuild,sean-gilliam/msbuild,chipitsine/msbuild,AndyGerlicher/msbuild,mono/msbuild,rainersigwald/msbuild,Microsoft/msbuild,mono/msbuild,Microsoft/msbuild,jeffkl/msbuild,jeffkl/msbuild,Microsoft/msbuild,chipitsine/msbuild,jeffkl/msbuild,cdmihai/msbuild,cdmihai/msbuild,AndyGerlicher/msbuild,rainersigwald/msbuild,sean-gilliam/msbuild,sean-gilliam/msbuild,cdmihai/msbuild,rainersigwald/msbuild,sean-gilliam/msbuild,AndyGerlicher/msbuild,Microsoft/msbuild,mono/msbuild,chipitsine/msbuild,jeffkl/msbuild