Fix string merging problems on mips*-linux-gnu

[Richard Sandiford]

Jakub Jelinek <jakub@redhat.com> writes:
> The patch is changing a wrong place.
> This is assembler's and linker's responsibility, not compiler's.

Oops.  Thanks for the info, I obviously failed to do my homework properly.
The fact that no other port did this should have sent the alarm bells ringing.

> Please revert it and fix binutils instead.

OK, I've reverted it.  I'll try to come up with a patch for the gas problem.

Richard