multilib-build: copy eclass from portable-stable

Copy the existing eclass from portage-stable.

BUG=b:139030617
TEST=Build kevin-arc64

Change-Id: I979c17bda674a7cb65f7c5d79374a13f26b15daf
Reviewed-on: https://chromium-review.googlesource.com/1753242
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: David Jacobo <djacobo@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed
tree: 6d6c920c07f46c1001c994ac705a2be2ce86da99
  1. OWNERS
  2. PRESUBMIT.cfg
  3. eclass/
  4. metadata/
  5. profiles/