Summary:
Add bitcode compatibility test for 6.0. On top of the normal disassemble
test, also runs the verifier to make sure simple 6.0 bitcode can pass
the current IR verifier.
Reviewers: vsk
Reviewed By: vsk
Subscribers: dexonsmith, llvm-commits
Differential Revision: https://reviews.llvm.org/D49086
llvm-svn: 336574
