[qtdeclarative] Merge current upstream 5.6 branch. Contributes to JB#…

…41362

Hopefully fixing the few seen ListModel related crashes. Not including
too many changes.

rpm/qtdeclarative.spec

@@ -1,6 +1,6 @@
 Name:       qt5-qtdeclarative
 Summary:    Qt Declarative library
-Version:    5.6.3
+Version:    5.6.3+git
 Release:    1%{?dist}
 Group:      Qt/Qt
 License:    LGPLv2.1 with exception or GPLv3