Rename PowerPC64 pcrel GOT TLS relocations

[Alan Modra]

On Sat, Jun 06, 2020 at 12:21:29AM -0700, Fangrui Song wrote:
> On Fri, Jun 5, 2020 at 10:12 PM Alan Modra via Binutils
> <binutils@sourceware.org> wrote:
> >
> > These relocations should have had REL in their names, to reflect the
> > fact that they are pc-relative.  Fix that now by adding _PCREL.
> > I've added some back-compatibility code to support anyone using
> > .reloc with the old relocations.
> 
> https://openpowerfoundation.org/?resource_lib=64-bit-elf-v2-abi-specification-power-architecture
> (Revision 1.4, June 22, 2017) hasn't been updated for nearly three
> years.
> For these relocation types, which specification is defining them?

The ELFv2 ABI has been updated to include Power10 related information,
and should be released soon.

-- 
Alan Modra
Australia Development Lab, IBM