[AMDGPU] Update AMDGPUUsage with DWARF proposal

Summary:
- Add AMDGPU DWARF proposal.
- Add references for gfx10 ISA and SemVer.

Subscribers: kzhuravl, jvesely, wdng, nhaehnle, yaxunl, aprantl, dstuttard, tpr, jfb, dmgreen, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D70523