First crack at waluigi overlay

Things still TODO:
* Figure out what kernel settings to use (first, we need to
  actually get a kernel that works for waluigi somewhere in
  the source tree).
* Tweak toolchain options
* Touchpad conf for waluigi
* Firmware stuff (chromeos-firmware, bct, ...)

BUG=chromium-os:21540
TEST=Can run "./build_packages --board=waluigi"

Change-Id: Id704773623328960b0c4a4db1a88367e76bd0b33
Reviewed-on: https://gerrit.chromium.org/gerrit/10692
Reviewed-by: Micah Catlin <micahc@chromium.org>
Tested-by: Micah Catlin <micahc@chromium.org>
Commit-Ready: Doug Anderson <dianders@chromium.org>
Tested-by: Doug Anderson <dianders@chromium.org>
19 files changed