buffet: Add base.updateBaseConfiguration implementation

Required base command handled by buffet.

BUG=brillo:810
TEST=`FEATURES=test emerge-gizmo buffet`

Change-Id: I97ecd9f5d792cc636e76bbff92899a7ddfa4a605
Reviewed-on: https://chromium-review.googlesource.com/273618
Reviewed-by: Vitaly Buka <vitalybuka@chromium.org>
Commit-Queue: Vitaly Buka <vitalybuka@chromium.org>
Tested-by: Vitaly Buka <vitalybuka@chromium.org>
7 files changed
tree: 93f8d53f2fe3489f14f39269af0481f03a2939f9
  1. buffet/