Add a test for the foldSelectICmpAndOr fix committed in r180779.

This tests a case where C1 and C2 were the same but X and Y were different
widths.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180907 91177308-0d34-0410-b5e6-96231b3b80d8