Qt Solutions new download paths and Clementine modifications.

1. Change download Qt Solutions tarballs download paths to working ones, as they disappeared from the original source since Nokia sold Qt to Digia.
2. Change qmake call to a better out-of-the-box -current multilib.
3. Modifications to build Clementine player on Slackware64 -current multilib.
4. Compile Clementine with newer iPod support (iPod nano 6th gen requires [this][1]), remote control and scripting enabled.
5. Slackbuilds changed: clementine, libqxt, qtiocompressor, qtlockedfile, qtsingleapplication.

[1]: https://github.com/denydias/libhashab