switch netd.o to BpfLoader v0.18 file format

This is a temporary thing for testing with framework/libs/net patch
that adds checks for V18 define.

This is very short term and will be reverted in the next topic,
that will make v0.18 the default.

Bug: 218408035
Test: booted on cuttlefish
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I22c414ebc64201db60eb872e0da0fea6c65eaede
1 file changed