libweave: Copy bind_lambda into libweave To move dependency on libchromeos. BUG=brillo:1257 TEST=`FEATURES=test emerge-gizmo libweave buffet` Change-Id: If15432e3c40dfd5613df1b0f3c523d8c3f2457c4 Reviewed-on: https://chromium-review.googlesource.com/293612 Reviewed-by: Alex Vakulenko <avakulenko@chromium.org> Commit-Queue: Vitaly Buka <vitalybuka@chromium.org> Tested-by: Vitaly Buka <vitalybuka@chromium.org>