gcc-bin: Add a frozen gcc 4.9.2 for Chrome OS

Add a gcc 4.9.2 binary prebuilt package to handle
aarch64, armv7a, and x86_64 ABIs.
This package currently uses the standalone toolchain
version 2021.01.04.014317 from chromiumos-sdk that has been
verified to work with GCC user packages.

This package adds 544,195.980 KiB to Chrome OS SDK chroot.

BUG=chromium:1095110
TEST=sudo emerge gcc-bin

Change-Id: I81663d0bd51a8f2edd78a8ffb660c044ec1942ab
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2617448
Tested-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Manoj Gupta <manojgupta@chromium.org>
4 files changed