Update tests to use %clang instead of 'clang', and forcibly disable use of '
clang ' or ' clang -cc1 ' or ' clang-cc ' in test lines (by substituting them to
garbage).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91460 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Frontend/ast-codegen.c b/test/Frontend/ast-codegen.c
index bd8a20a..b5b2157 100644
--- a/test/Frontend/ast-codegen.c
+++ b/test/Frontend/ast-codegen.c
@@ -1,5 +1,5 @@
-// RUN: clang -emit-ast -o %t.ast %s
-// RUN: clang -emit-llvm -S -o - %t.ast | FileCheck %s
+// RUN: %clang -emit-ast -o %t.ast %s
+// RUN: %clang -emit-llvm -S -o - %t.ast | FileCheck %s
 
 // CHECK: module asm "foo"
 __asm__("foo");