Log script activities and deleted toplevel cache files/directories.
Use sudo to override permissions in cache.
Remove legacy single file based cache if it exists by error.
Create cache directory with appropriate permissions if missing.
Change-Id: Id6ad930bf8ba9233eeea8a7602d25c98d0058409
Reviewed-by: Simo Fält <simo.falt@qt.io>
(cherry picked from commit aa9095d4cd)
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
