Merging r317470:

------------------------------------------------------------------------
r317470 | sdardis | 2017-11-06 02:50:04 -0800 (Mon, 06 Nov 2017) | 12 lines

[mips] Fix PR35140

Mark all symbols involved with TLS relocations as being TLS symbols.

This resolves PR35140.

Thanks to Alex Crichton for reporting the issue!

Reviewers: atanasyan

Differential Revision: https://reviews.llvm.org/D39591

------------------------------------------------------------------------

llvm-svn: 318188