dev-libs/libusb-compat: import 0.1.5 from upstream

This CL imports libusb-compat 0.1.5-r3 from upstream Gentoo and modifies
the ebuild to use KEYWORDS="*".

BUG=chromium:381299
CQ-DEPEND=CL:202731
TEST=Tested the following:
1. `emerge-$BOARD dev-libs/libusb-compat`
2. `sudo emerge dev-libs/libusb-compat`
3. Test `servod`.

Change-Id: I4ed45a78f41b1859cbbf6ffcb739e9e31558e6b8
Reviewed-on: https://chromium-review.googlesource.com/202730
Reviewed-by: Gaurav Shah <gauravsh@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
4 files changed