eliminate some random .ll file outputs


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63117 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/unsupported.c b/test/CodeGen/unsupported.c
index 664119a..c522149 100644
--- a/test/CodeGen/unsupported.c
+++ b/test/CodeGen/unsupported.c
@@ -1,4 +1,4 @@
-// RUN: clang -verify -emit-llvm -o %t %s 
+// RUN: clang -verify -emit-llvm -o - %s 
 
 int f0(int x) {
   int vla[x];