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/Preprocessor/header_lookup1.c b/test/Preprocessor/header_lookup1.c
index 10049ad..df58a6e 100644
--- a/test/Preprocessor/header_lookup1.c
+++ b/test/Preprocessor/header_lookup1.c
@@ -1,2 +1,2 @@
-// RUN: clang -I /usr/include %s -E | grep 'stdio.h.*3.*4'
+// RUN: clang-cc -I /usr/include %s -E | grep 'stdio.h.*3.*4'
 #include <stdio.h>