QMap and QMultiMap will go in a separate commit, due to QMap's
insertion behavior that "reverses" the inserted elements.
[ChangeLog][QtCore][QHash] Added range constructor.
[ChangeLog][QtCore][QMultiHash] Added range constructor.
Change-Id: Icfd0d0afde27792e8439ed6df3e8774696b134d3
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Sérgio Martins <sergio.martins@kdab.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>