buildroot

package/rpi-bt-firmware: change to LibreELEC github repo

Include BCM4345C0.hcd for the rpi3 b+

Signed-off-by: Martin Bark <martin@barkynet.com>
[Thomas: rebase on master, use make foreach loop instead of shell for
loop.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>