p0f: build fix attempt for Hydra

Signed-off-by: Austin Seipp <aseipp@pobox.com>
spiped: attempt to fix linux Hydra build

Signed-off-by: Austin Seipp <aseipp@pobox.com>
libseccomp: attempt to fix Hydra build

Signed-off-by: Austin Seipp <aseipp@pobox.com>
capstone: attempt to fix Linux build, remove Darwin build

The Darwin build seems fixable but I can't test right now.

Signed-off-by: Austin Seipp <aseipp@pobox.com>