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/incompatible-sign.c b/test/Sema/incompatible-sign.c
index 9747327..a62f9a8 100644
--- a/test/Sema/incompatible-sign.c
+++ b/test/Sema/incompatible-sign.c
@@ -1,4 +1,4 @@
-// RUN: clang %s -verify -fsyntax-only
+// RUN: clang-cc %s -verify -fsyntax-only
 
 int a(int* x);
 int b(unsigned* y) { return a(y); } // expected-warning {{pointer types point to integer types with different sign}}