[ChangeLog] Renamed QML import from
"import QtQuick.Enterprise.VirtualKeyboard" to
"import QtQuick.VirtualKeyboard", as the module is now open-source.

Change-Id: I240a3c1b598ca4aa41d2aad02b6e548622308833
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>