Move option-related hooks to common structure

[Ian Lance Taylor]

"Joseph S. Myers" <joseph@codesourcery.com> writes:

> Ian, what is the right way to handle the gofrontend change in this
> patch (to update code for the move of a hook from targetm to
> targetm_common)?  It's small, mechanical and I think below the
> threshold of significance for copyright.

I agree, but to avoid any confusion I just moved the code into the
gcc-specific area, as is appropriate in any case.  Please move your
patch from go/gofrontend/export.cc to the identical code at the end of
go/go-backend.c.

Ian