Partially revert r336268 in address-offsets.ll

Summary: There the typos are intentional, explicitly introduced to disable these cases in r280285.

Reviewers: bkramer

Reviewed By: bkramer

Subscribers: dschuff, sbc100, jgravelle-google, aheejin, llvm-commits

Differential Revision: https://reviews.llvm.org/D48962

llvm-svn: 336336