The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/71dc624ae69bca01d90a670ed78e926ab6b087de

commit 71dc624ae69bca01d90a670ed78e926ab6b087de
Author: Rahul Chaudhry <rahulchaudhry@chromium.org>
Date: Fri Sep 16 23:36:36 2016

sys-devel/gcc: disable gccgo.

This change disables default installation of gccgo for both host
and cross-compilers. Gccgo from this ebuild is stale (providing
Go 1.2 support, since we haven't upgraded gcc in a while).

Go toolchains for host and targets are now provided by dev-lang/go,
which is actively maintained and kept more up-to-date.

BUG= chromium:641857 
TEST='cbuildbot --remote -g 386425 --latest-toolchain chromiumos-sdk' was successful.

Change-Id: I144667e504d8b4dc9445af33c65bc10f6d59d24d
Reviewed-on: https://chromium-review.googlesource.com/386425
Commit-Ready: Rahul Chaudhry <rahulchaudhry@chromium.org>
Tested-by: Rahul Chaudhry <rahulchaudhry@chromium.org>
Reviewed-by: Rahul Chaudhry <rahulchaudhry@chromium.org>

[modify] https://crrev.com/71dc624ae69bca01d90a670ed78e926ab6b087de/sys-devel/gcc/gcc-9999.ebuild

Closing. Please reopen it if its not fixed. Thanks!