Build vxcproj file instead of sln file on fullCLR

Building sln file generated by cmake causes troubles on my dev machine.
It contains additional checks for tools version that cannot be satisfied.

build.FullCLR.ps1

@@ -1,11 +1,12 @@
 param(
+    # "" is for default generator on the platform
     [ValidateSet(
         "",
         "Visual Studio 12 2013", 
         "Visual Studio 12 2013 Win64",
         "Visual Studio 14 2015", 
         "Visual Studio 14 2015 Win64")]
-    [string]$cmakeGenerator = "",
+    [string]$cmakeGenerator = "Visual Studio 12 2013",
 
     [ValidateSet(
         "Debug",
@@ -51,7 +52,6 @@ try
     cd src\Microsoft.PowerShell.ConsoleHost
     dotnet publish --framework dnx451 --output $BINFULL
 
-    # build native host
     mkdir $build -ErrorAction SilentlyContinue
     cd $build
 
@@ -63,7 +63,8 @@ try
     {
         cmake ..\src\powershell-native
     }
-    msbuild powershell.sln /p:Configuration=$msbuildConfiguration
+    
+    msbuild powershell.vcxproj /p:Configuration=$msbuildConfiguration
 
     cp -rec $msbuildConfiguration\* $BINFULL
 }