[cc_fuzz] Don't build infra-disable targets in `m haiku`.

`make haiku` shouldn't build fuzz targets that are disabled on the
continuous fuzzing infra. This should reduce pressure on the repackager.

Bug: N/A
Test: make haiku && verify that example_fuzzer isn't there.
Change-Id: I6a687a3ab8cbb1eb75113e96aba2c4f9f8058010