UpdateTestChecks: ppc32 triple support

Summary:
Appears identical to powerpc64{,le}.
Regenerate test that is being affected by upcoming patch.

Reviewers: RKSimon

Reviewed By: RKSimon

Subscribers: nemanjai, jsji, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D62339

llvm-svn: 361543