Relax test to try and appease builders. NFC.

I'm not sure why, but on some bots, the order of two instructions are
swapped (as compared to the output on my machine). Loosen up the
CHECK-NEXT directives to deal with this.

Failing bot: http://lab.llvm.org:8011/builders/clang-with-lto-ubuntu/builds/3097

llvm-svn: 304486