qmlplugindump1: make it behave more like qmplugindump

* use -nonrelocatable as flag
* always emit meta object revisions

Change-Id: I8bab4e4faf458f403dbfdc9e6c11c0ad17c27295
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
Add changes-5.1.0 file

Change-Id: I93db177fbc1309033b06be11dadee7580b03e8f3
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
Merge remote-tracking branch 'origin/release' into stable

Change-Id: Ie3ba29b032c149795efb6abd91b2d65e6e666540