systuils/gobi_loader: Firmware Loader for Qualcomm Gobi USB Chipsets

FreeBSD trimmed version / port of the gobi_oader, originally from
http://www.codon.org.uk/~mjg59/gobi_loader which likely never worked on
FreeBSD. This will load the firmware of the GOBI u3g parts on insertion.

Reviewed by: imp (tweaked sample file from original)
Reviewed by: daniel.engberg.lists@pyret.net
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D22938