Fix the buildbot failure introduced by r351404

EXPENSIVE_CHECKS buildbots are failing due to r351404.

Add x1 as live in to the funclet basic block for SEH funclets, as well as
-verify-machineinstrs to the test case that triggered the failure.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351472 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed