[AArch64] Fix mir test case liveins info.

The test case added in r332265 had incomplete livein information which
was caught by the EXPENSIVE_CHECKS bot.  Fix the livein information and
add -verify-machineinstrs to the test case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@332367 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed