kbuild: refresh current version from upstream

This pulls in EAPI=7 updates & pkg-config fixes.

BUG=chromium:985180
TEST=CQ passes

Change-Id: Ieb03b1ed0c2ce241405576979301d08642868fa1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2213744
Reviewed-by: Michael Mortensen <mmortensen@google.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed