Add new options to usage

build-test.cmd

@@ -563,6 +563,8 @@ echo     ubuntu.16.10-x64: Builds overlay for Ubuntu 16.10
 echo     win-x64: Builds overlay for portable Windows
 echo     win7-x64: Builds overlay for Windows 7
 echo crossgen: Precompiles the framework managed assemblies
+echo copynativeonly: Only copy the native test binaries to the managed output. Do not build the native or managed tests.
+echo skipgeneratelayout: Do not generate the Core_Root layout or the CoreFX testhost.
 echo targetsNonWindows:
 echo Exclude- Optional parameter - specify location of default exclusion file ^(defaults to tests\issues.targets if not specified^)
 echo     Set to "" to disable default exclusion file.

build-test.sh

@@ -584,6 +584,8 @@ usage()
     echo "bindir - output directory (defaults to $__ProjectRoot/bin)"
     echo "msbuildonunsupportedplatform - build managed binaries even if distro is not officially supported."
     echo "priority1 - include priority=1 tests in the build"
+    echo "copynativeonly: Only copy the native test binaries to the managed output. Do not build the native or managed tests."
+    echo "skipgeneratelayout: Do not generate the Core_Root layout or the CoreFX testhost."
     exit 1
 }