Enable tklock if device lock gets activated

Otherwise having device lock timeout that is shorter than tklock
grace period can lead into situation where the device is locked but
the last active application can still be made visible and used.

[mce] Enable tklock if device lock gets activated
Add missing prototype
[packaging] Fix rpm preun/post/postun scripts.

Signed-off-by: Marko Saukko <marko.saukko@jollamobile.com>
Merge pull request #127 from nemomobile/packaging

[packaging] Fix rpm preun/post/postun scripts.
Merge pull request #126 from spiiroin/track_device_lock

Enable tklock if device lock gets activated
Bump mce version to 1.23.4