Rename clang to clang-cc.

Tests and drivers updated, still need to shuffle dirs.

llvm-svn: 67602
diff --git a/clang/test/Sema/implicit-int.c b/clang/test/Sema/implicit-int.c
index 2896253..71a5724 100644
--- a/clang/test/Sema/implicit-int.c
+++ b/clang/test/Sema/implicit-int.c
@@ -1,4 +1,4 @@
-// RUN: clang -fsyntax-only %s -verify -pedantic
+// RUN: clang-cc -fsyntax-only %s -verify -pedantic
 
 foo() { // expected-warning {{type specifier missing, defaults to 'int'}}
 }