Support/ELF: Add R_AMDGPU_GOTPCREL relocation

Summary:
We will start generating this in a future patch.

Reviewers: arsenm, kzhuravl, rafael, ruiu, tony-tye

Subscribers: arsenm, llvm-commits, kzhuravl

Differential Revision: http://reviews.llvm.org/D21482

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273628 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed