Mark two Clang tests as passing on ARM

Also move one of them from grep to FileCheck.
Patch from Joey Gouly <joey.gouly@arm.com>!



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164929 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed