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/Frontend/stdin.c b/test/Frontend/stdin.c
index a3899de..35fe45d 100644
--- a/test/Frontend/stdin.c
+++ b/test/Frontend/stdin.c
@@ -1,3 +1,3 @@
-// RUN: clang -E - < /dev/null > %t
+// RUN: clang-cc -E - < /dev/null > %t
 // RUN: grep '<built-in>' %t