Clobber builds because SDK releases can include new meson version, making hard to recover from using an old build directory.
Pull request: https://github.com/WebKit/WebKit/pull/4304
Committed 254429@main (f9d9625d6e04): <https://commits.webkit.org/254429@main> Reviewed commits have been landed. Closing PR #4304 and removing active labels.
<rdar://problem/99866484>