In addition to the ubldr file, also copy ubldr.bin to the

In addition to the ubldr file, also copy ubldr.bin to the
MS-DOS partition.  This will help with transitioning to
a single arm/armv6 userland build which could be used for
all FreeBSD/armv6 images without UBLDR_LOADADDR being set
for each board (ultimately requiring a separate buildworld
for each currently).

Requested by:	ian
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation