Add SYS_ulock_wait2 to all WebKit sandboxes.
<rdar://problem/102648393>
Pull request: https://github.com/WebKit/WebKit/pull/8154
Committed 258402@main (088424c3ef5f): <https://commits.webkit.org/258402@main> Reviewed commits have been landed. Closing PR #8154 and removing active labels.