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/cpp-output.c b/test/Frontend/cpp-output.c
index 9a6fc9b..e44095b 100644
--- a/test/Frontend/cpp-output.c
+++ b/test/Frontend/cpp-output.c
@@ -1,7 +1,7 @@
-// RUN: clang -E -o %t -C %s
+// RUN: %clang -E -o %t -C %s
 // RUN: grep '^int x; // comment' %t
 // RUN: grep '^x x' %t
-// RUN: clang -E -o %t -CC %s
+// RUN: %clang -E -o %t -CC %s
 // RUN: grep '^int x; // comment' %t
 // RUN: grep '^x /\* comment \*/ x /\* comment \*/' %t