[PATCH] Fix CodeGen/PowerPC/stack-protector.ll test case on OpenBSD

[Matthew Dempsky]

On OpenBSD, the stack smash protection transform uses "__guard_local"
and "__stack_smash_handler" instead of "__stack_chk_guard" and
"__stack_chk_fail".  However, CodeGen/PowerPC/stack-protector.ll
doesn't specify a target OS, so on OpenBSD it fails.

Easy fix: Add -mtriple=ppc32-unknown-linux to make the test more host
OS agnostic.

While here, it's easy enough to switch to FileCheck so llc only needs
to run once.  I think this is a win?

Index: llvm/test/CodeGen/PowerPC/stack-protector.ll
===================================================================
--- llvm/test/CodeGen/PowerPC/stack-protector.ll	(revision 184494)
+++ llvm/test/CodeGen/PowerPC/stack-protector.ll	(working copy)
@@ -1,5 +1,6 @@
-; RUN: llc -march=ppc32 < %s -o - | grep "__stack_chk_guard"
-; RUN: llc -march=ppc32 < %s -o - | grep "__stack_chk_fail"
+; RUN: llc -march=ppc32 -mtriple=ppc32-unknown-linux < %s -o - | FileCheck %s
+; CHECK: __stack_chk_guard
+; CHECK: __stack_chk_fail
 
 @"\01LC" = internal constant [11 x i8] c"buf == %s\0A\00"		; <[11 x i8]*> [#uses=1]