[opaque pointer types] [NFC] gep_type_{begin,end} now take source element type and address space.

Reviewers: mjacob, dblaikie

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D16436

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@258474 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed