Fix buildtesthost option for only building CoreFX test dependencies

Author: A-And

build-test.cmd

@@ -78,7 +78,7 @@ if /i "%1" == "checked"               (set __BuildType=Checked&set processedArgs
 
 if /i "%1" == "skipmanaged"           (set __SkipManaged=1&set processedArgs=!processedArgs! %1&shift&goto Arg_Loop)
 if /i "%1" == "skipnative"            (set __SkipNative=1&set processedArgs=!processedArgs! %1&shift&goto Arg_Loop)
-if /i "%1" == "buildtesthost"         (set __SkipNative=1&__SkipManaged=1&set processedArgs=!processedArgs! %1&shift&goto Arg_Loop)
+if /i "%1" == "buildtesthost"         (set __SkipNative=1&set __SkipManaged=1&set processedArgs=!processedArgs! %1&shift&goto Arg_Loop)
 if /i "%1" == "toolset_dir"           (set __ToolsetDir=%2&set __PassThroughArgs=%__PassThroughArgs% %2&set processedArgs=!processedArgs! %1 %2&shift&shift&goto Arg_Loop)
 if /i "%1" == "buildagainstpackages"  (set __ZipTests=1&set __BuildAgainstPackagesArg=-BuildTestsAgainstPackages&set processedArgs=!processedArgs! %1&shift&goto Arg_Loop)
 if /i "%1" == "skiprestorepackages"   (set __SkipRestorePackages=1&set processedArgs=!processedArgs! %1&shift&goto Arg_Loop)