Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
diff --git a/clang/test/Sema/invalid-struct-init.c b/clang/test/Sema/invalid-struct-init.c
index 9777a27..73e2e44 100644
--- a/clang/test/Sema/invalid-struct-init.c
+++ b/clang/test/Sema/invalid-struct-init.c
@@ -1,4 +1,4 @@
-// RUN: clang %s -verify -fsyntax-only
+// RUN: clang-cc %s -verify -fsyntax-only
 
 typedef struct _zend_module_entry zend_module_entry;
 struct _zend_module_entry {