buffet: Move WebServClient out of libweave

libweave now relies on platform specific implementation of
weave::HttpServer.

BUG=brillo:1252
TEST='FEATURES=test emerge-gizmo buffet'

Change-Id: I8f2c2f119699ff5096a74dc05948db0eaf108ea3
Reviewed-on: https://chromium-review.googlesource.com/290142
Commit-Queue: Vitaly Buka <vitalybuka@chromium.org>
Trybot-Ready: Vitaly Buka <vitalybuka@chromium.org>
Tested-by: Vitaly Buka <vitalybuka@chromium.org>
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
11 files changed
tree: 2c7c932fc0a28683c3988b9c0637e9f4536dfe41
  1. buffet/
  2. libweave/