net: filter: add test_bpf module under MAINTAINERS' networking section

Add lib/test_bpf.c entry to maintainers file under networking.
All changes were posted via netdev for review, so make sure
other people Cc it as well when they call get_maintainer.pl.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -6130,6 +6130,7 @@ F:	include/uapi/linux/netdevice.h
 F:	tools/net/
 F:	tools/testing/selftests/net/
 F:	lib/random32.c
+F:	lib/test_bpf.c
 
 NETWORKING [IPv4/IPv6]
 M:	"David S. Miller" <davem@davemloft.net>