[PATCH] Fix detection of missing plugin for LTO objects.

[Nick Clifton]

Hi Martin,

> The patch is fix for:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91376

> 2019-08-12  Martin Liska  <mliska@suse.cz>
> 
> 	* elflink.c: Report error only for not relocatable.
> 	* linker.c (_bfd_generic_link_add_one_symbol): Do not handle
> 	here lto_slim_object as it's handled in caller.
> 
> gold/ChangeLog:
> 2019-08-12  Martin Liska  <mliska@suse.cz>
> 
> 	* object.cc (big_endian>::do_layout): Do not report error,
> 	but only set a flag.
> 	(big_endian>::do_add_symbols): Report error only for when
> 	relocatable.

Approved, please apply - but ... would you mind
including the PR number in the ChangeLog entries
please ?

Cheers
  Nick