buildroot

package/rpi-userland: don't install file in random location

Currently, rpi-userland installs files in $(@D)/../../bin/ which is
entirely stupid, especially in cross-compilation.

Get rid of the dubious, broken, custom install command.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Tested-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>