app-portage/gentoolkit{,-dev}: import from upstream Gentoo

This grabs the latest stable versions from upstream so we can punt
the versions in the cros overlay.

BUG=None
TEST=`emerge gentoolkit{,-dev}` installs the latest versions
TEST=`python cros_portage_upgrade_unittest.py` passes
TEST=`cbuildbot x86-generic-full` works
TEST=build_packages+build_image for x86-alex boots

Change-Id: I11f75280082c4482b2a1108847f92e56a74dc4d5
Reviewed-on: https://gerrit.chromium.org/gerrit/10977
Reviewed-by: David James <davidjames@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Ready: Mike Frysinger <vapier@chromium.org>
8 files changed