Less restrictive check in unit test for unsupported debug info options

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158916 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Driver/debug-unsupported.c b/test/Driver/debug-unsupported.c
index 2c3de0b..acbd767 100644
--- a/test/Driver/debug-unsupported.c
+++ b/test/Driver/debug-unsupported.c
@@ -10,4 +10,4 @@
 // RUN: %clang -c -gvms0 %s 2>&1 | FileCheck %s
 // RUN: %clang -c -gtoggle %s 2>&1 | FileCheck %s
 //
-// CHECK: clang: error: unsupported option
+// CHECK: error: unsupported option