Upgrade epatch, estack, eutils, and ltprine eclasses to upstream.

The upgraded eutils is needed for upgrading sys-libs/readline. The other
eclasses are inherited by eutils, so they were upgraded together.

BUG=chromium:1117585
TEST=sudo emerge sys-libs/readline

Cq-Depend: chromium:2477724
Change-Id: Ifa1f840e5044bdebca6fcfc84f7bbdadb2eaa71f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2360511
Tested-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Reviewed-by: Benjamin Gordon <bmgordon@chromium.org>
4 files changed