bpf: use DEFAULT_BPF_MAP_SELINUX_CONTEXT in DEFINE_BPF_PROG_EXT instead of ""

Test: TreeHugger, atest bpf_existence_test
Flag: EXEMPT mainline/noop
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I3700a363efc579730c6daa8251b527838ef86294
1 file changed