uhd-firmware : New recipe for version 3.5.2.

Signed-off-by: Philip Balister <philip@opensdr.com>
uhd : Update recipe to version 3.5.2.

Signed-off-by: Philip Balister <philip@opensdr.com>
gnuradio : Update to version 3.6.4.1.

Signed-off-by: Philip Balister <philip@opensdr.com>