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/struct-init.c b/test/CodeGen/struct-init.c
index ab14a1d..7d9d708 100644
--- a/test/CodeGen/struct-init.c
+++ b/test/CodeGen/struct-init.c
@@ -1,4 +1,4 @@
-// RUN: clang %s -emit-llvm -o %t
+// RUN: clang %s -emit-llvm -o -
 
 typedef struct _zend_ini_entry zend_ini_entry;
 struct _zend_ini_entry {