Author: Dan Nicholson
Revision Date: 2021-07-28 18:44:20 UTC

Remove cache lock file in mostlyclean

In revision 748 a cache lock file was added to fix issues with
concurrent access to the cache file. This leaves behind the lock file,
which is required so flock can operate on a consistent inode.
Unfortunately, it breaks make distcheck that expects all generated files
to be deleted.

Delete the lock file when the cache file is deleted in mostlyclean. At
that point make will no longer be starting any intltool-merge processes.