Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
diff --git a/clang/test/Sema/pragma-unused.c b/clang/test/Sema/pragma-unused.c
index 8181802..fe8bf860 100644
--- a/clang/test/Sema/pragma-unused.c
+++ b/clang/test/Sema/pragma-unused.c
@@ -1,4 +1,4 @@
-// RUN: clang -fsyntax-only -verify %s
+// RUN: clang-cc -fsyntax-only -verify %s
 
 void f1(void) {
   int x, y, z;