Non-unified build fixes, late July 2022 edition
OK, well I cannot successfully link a non-unified build because ld uses too much RAM, so this commit might not be comprehensive. But it should help, at least.
Pull request: https://github.com/WebKit/WebKit/pull/2851
Committed 252956@main (19c49cf8315e): <https://commits.webkit.org/252956@main> Reviewed commits have been landed. Closing PR #2851 and removing active labels.