libconfig, sslh: upgraded packages to upstream

Upgraded dev-libs/libconfig to version 1.5 on amd64, x86
Upgraded net-misc/sslh to version 1.17 on amd64, x86

Note that cros_portage_upgrade was not able to build these packages for
ARM because the upstream ebuild is only unmasked for amd64 and x86, but
since our script unmasks all arches the imported ebuild works as-is.

BUG=chromium:500185
TEST=emerge-veyron_minnie sslh && cros deploy
CQ-DEPEND=CL:277473

Change-Id: I903d361f590abb5d0d43533aa130b5f815519d7b
Reviewed-on: https://chromium-review.googlesource.com/277442
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Commit-Queue: Kevin Cernekee <cernekee@chromium.org>
Tested-by: Kevin Cernekee <cernekee@chromium.org>
12 files changed