targetcli-fb: new package

targetcli-fb is a command-line interface for configuring the LIO
generic SCSI target, present in 3.x Linux kernel versions.

Signed-off-by: Christophe Vu-Brugier <cvubrugier@fastmail.fm>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>