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/Sema/merge-decls.c b/test/Sema/merge-decls.c
index e6d60c4..f4c25f5 100644
--- a/test/Sema/merge-decls.c
+++ b/test/Sema/merge-decls.c
@@ -1,4 +1,4 @@
-// RUN: clang %s -verify -fsyntax-only
+// RUN: clang-cc %s -verify -fsyntax-only
 
 void foo(void);
 void foo(void) {}