transmission: Update to version 4.0.3

transmission: Update to version 4.0.3

- Update from version 3.00 to 4.0.3
- This v2 version has usr/share/transmission directory uncommented.
- Update of rootfile
- Build changed from autotools configure to cmake
- Changelog is very large. For details see
   https://github.com/transmission/transmission/releases/

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>