Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67602 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGenObjC/messages.m b/test/CodeGenObjC/messages.m
index fab3c5d..b2bda67 100644
--- a/test/CodeGenObjC/messages.m
+++ b/test/CodeGenObjC/messages.m
@@ -1,4 +1,4 @@
-// RUN: clang -fnext-runtime --emit-llvm -o %t %s
+// RUN: clang-cc -fnext-runtime --emit-llvm -o %t %s
 
 typedef struct {
   int x;