[x86] Relax the line in this check to pacify build bots.

I still don't love testing the comments, but its the only sane way to
check shuffle instructions...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212326 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed