Desensitize a couple of PPC regression tests

Use CHECK-DAG to make these regression tests more resilient against changes in
instruction scheduling.

llvm-svn: 195978
diff --git a/llvm/test/CodeGen/PowerPC/unaligned.ll b/llvm/test/CodeGen/PowerPC/unaligned.ll
index d050803..d469c62 100644
--- a/llvm/test/CodeGen/PowerPC/unaligned.ll
+++ b/llvm/test/CodeGen/PowerPC/unaligned.ll
@@ -65,9 +65,9 @@
 ; These loads and stores are legalized into aligned loads and stores
 ; using aligned stack slots.
 ; CHECK: @foo6
-; CHECK: ld
-; CHECK: ld
-; CHECK: std
-; CHECK: std
+; CHECK-DAG: ld
+; CHECK-DAG: ld
+; CHECK-DAG: stdx
+; CHECK: stdx
 }