NetBpfLoad: fix empty log_buf detection logic

log_buf.size() was always BPF_LOAD_LOG_SZ and thus != 0

After changing ALOGD to ALOGI you now see (for example):
  NetBpfLoad: BPF_PROG_LOAD call for /apex/com.android.tethering/etc/bpf/net_shared/block.o (bind4_block_port) returned 'processed 55 insns (limit 1000000) max_states_per_insn 0 total_states 4 peak_states 4 mark_read 1' fd: 6 (ok)

(ALOGV/ALOGD's are effectively silently dropped by the KernelLogger we use)

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I4a296976ae3f1e2217c46d81ed48850fdfa95a3c
1 file changed