buffet: Extracted libweave into separate directory

It still has references to dbus, buffet and other ChromeOS specific
stuff.

BUG=brillo:1235
TEST=FEATURES=test emerge-gizmo buffet

Change-Id: Ib108960ee88afcf2ecdddf37ce30bd5f168c0034
Reviewed-on: https://chromium-review.googlesource.com/283509
Tested-by: Vitaly Buka <vitalybuka@chromium.org>
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>
129 files changed
tree: aa01ceb7e348abae6c08dd1ce0438fa6db201785
  1. buffet/
  2. libweave/