GStreamer: disable clock syncing in video sink for live sources.

Task-number: QTBUG-38465
Change-Id: Icdf2df36b9b3c09dd047e60ac24e221a3d233c6f
Reviewed-by: Christian Stromme <christian.stromme@digia.com>
PLS parser: Don't translate entries.

Each entry in a PLS file uses the keywords 'File', 'Title' and 'Length'
in English, it should not be translated to the user's locale...

Task-number: QTBUG-38755
Change-Id: Ibd5bee18a856b3ebc1fdb177241db7a39b65d264
Reviewed-by: Christian Stromme <christian.stromme@digia.com>