Add CMake support to the clang unittests.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125561 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Unit/lit.cfg b/test/Unit/lit.cfg
index dfa3bf2..794234c 100644
--- a/test/Unit/lit.cfg
+++ b/test/Unit/lit.cfg
@@ -45,8 +45,8 @@
     # configuration hasn't been created by the build system, or we are in an
     # out-of-tree build situation).
 
-    # Check for 'clang_site_config' user parameter, and use that if available.
-    site_cfg = lit.params.get('clang_site_config', None)
+    # Check for 'clang_unit_site_config' user parameter, and use that if available.
+    site_cfg = lit.params.get('clang_unit_site_config', None)
     if site_cfg and os.path.exists(site_cfg):
         lit.load_config(config, site_cfg)
         raise SystemExit