gnuradio : Remove old files.

Left the buildsys patch for now. It does not apply, but I have only
built this with gcc-4.6 from toolchain layer, not gcc from Angstrom.
The patch does not apply, but I am saving it to remind me how to fix
the problem.

Signed-off-by: Philip Balister <philip@opensdr.com>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>