AMDGPU: Add a missing test for the 128-bit local addr space option

This should have been pushed with:
  "AMDGPU: enable 128-bit for local addr space under an option"

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@332404 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed