update unit test

Author: farzonl

clang/unittests/Driver/DXCModeTest.cpp

@@ -85,7 +85,7 @@ TEST(DxcModeTest, TargetProfileValidation) {
                         InMemoryFileSystem, Diags);
   validateTargetProfile("-Tcs_6_8", "dxilv1.8--shadermodel6.8-compute",
                         InMemoryFileSystem, Diags);
-  validateTargetProfile("-Tlib_6_x", "dxilv1.8--shadermodel6.15-library",
+  validateTargetProfile("-Tlib_6_x", "dxilv1.9--shadermodel6.15-library",
                         InMemoryFileSystem, Diags);
 
   // Invalid tests.