libusb: add libusb to chromiumos overlay

This change:
    checks in upstream 1.0.21.
    adds a patch to enable libusb to take an fd as device handle. Thus we can
sandbox libusb.

BUG=chromium:831850
TEST=local build

Change-Id: I1d97171160e4bdb5b3968dd78796126696eef2e5
Reviewed-on: https://chromium-review.googlesource.com/1331019
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Jingkui Wang <jkwang@google.com>
Reviewed-by: Jingkui Wang <jkwang@google.com>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
5 files changed