udevtrigger: Breakout udevtrigger package

Current versions of udev no longer provide the separate udevtrigger
utility that hotplug2 needs.  To allow for the udev package to
be updated, yet still provide a udevtrigger, create a new package
udevtrigger that is built from old udev sources.

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>

SVN-Revision: 17377