Introduce FileSystem::updateFileModificationTime() to update the modification time of a file.
Created attachment 428625 [details] Patch
Created attachment 428631 [details] Patch
Committed r277499 (237731@main): <https://commits.webkit.org/237731@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 428631 [details].
<rdar://problem/78025501>