[GlobalISel][AArch64] LegalizerInfo verifier: Adding LegalizerInfo::verify(...) call w/o fixing bugs

This is to make it clear what kind of bugs the LegalizerInfo::verifier
is able to catch and test its output

Reviewers: aemerson, qcolombet

Reviewed By: aemerson

Differential Revision: https://reviews.llvm.org/D46338

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333597 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed