Add targets for vp8_depacketizer_fuzzer, vp8_qp_parser_fuzzer, vp9_depacketizer_fuzzer, vp9_qp_parser_fuzzer.
<rdar://problem/118856452>
Pull request: https://github.com/WebKit/WebKit/pull/20962
Committed 271182@main (897eff3c7867): <https://commits.webkit.org/271182@main> Reviewed commits have been landed. Closing PR #20962 and removing active labels.