[Bug c/84173] Support glibc multiarch interpreter names

[javier--1JjCLmwH3DOs1h35RYKsyJrkQzDNHN at jasp dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84173

--- Comment #12 from Javier Serrano Polo <javier--1JjCLmwH3DOs1h35RYKsyJrkQzDNHN at jasp dot net> ---
Created attachment 43357
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43357&action=edit
Initial support for multiarch interpreters

(In reply to Marc Glisse from comment #11)
> If you intend to send a patch, you can send it directly to
> gcc-patches@gcc.gnu.org, you don't need a bugzilla entry...

Thank you, but Bugzilla helps with organization.

Multiarch interpreter names are officially supported in Debian. Please have a
look at this patch against GCC 6.3.0. It only supports x86 architectures, but
it is simpler to review.