x86: Put back BFD_RELOC_X86_64_GOTPCREL

Put back BFD_RELOC_X86_64_GOTPCREL in TC_FORCE_RELOCATION_LOCAL, which
was removed by

commit 56ceb5b5405af23eddd12e12d8ba849010120324
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Thu Oct 22 04:49:20 2015 -0700

    Add R_X86_64_[REX_]GOTPCRELX support to gas and ld

by accident.
6 files changed