Correct two straggling "%Q" + "implode(...)" callsites in Revision updates

Summary:
See https://discourse.phabricator-community.org/t/error-seems-to-be-related-with-da40f8074-and-php-7-3/2102/12. When creating or updating revisions, we do some manual query construction to update the affected path table.

Update these queries to modern qsprintf().

Test Plan: Created and updated revisions affecting paths, no more logs in the webserver log.

Reviewers: amckinley

Reviewed By: amckinley

Differential Revision: https://secure.phabricator.com/D19846