libgo: update hurd support

Patch from Svante Signell.

Fixes https://gcc.gnu.org/PR98496

Change-Id: Icff706ab2999210accbe28d6ed5acfab06298560
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/283692
Trust: Ian Lance Taylor <iant@golang.org>
Trust: Than McIntosh <thanm@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
7 files changed