libipq: fix compile error

libipq.c: In function `ipq_create_handle':
libipq.c:220: error: `NFPROTO_IPV4' undeclared (first use in this function)
libipq.c:220: error: (Each undeclared identifier is reported only once
libipq.c:220: error: for each function it appears in.)
libipq.c:222: error: `NFPROTO_IPV6' undeclared (first use in this function)

Add the required includes.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
1 file changed