Update qt5 wip/qt6

qtbase pointing to dev branch, and other repos pointing to
wip/qt6.

qtwebengine and qtwebview are not built at the moment. The build of
the mentioned repos will be restored after bumping qtbase version
to 6.0.0, and after the subsequent qt/qt5 wip/qt6 integration is
merged.

Change-Id: I9b6b8136b2f58b181ae2d2dadb8a96b9c1103225
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

.gitmodules

@@ -216,7 +216,7 @@
 	path = qtwebengine
 	url = ../qtwebengine.git
 	branch = dev
-	status = addon
+	status = ignore
 	priority = 10
 [submodule "qtcanvas3d"]
 	depends = qtdeclarative
@@ -230,7 +230,7 @@
 	path = qtwebview
 	url = ../qtwebview.git
 	branch = dev
-	status = addon
+	status = ignore
 [submodule "qtquickcontrols2"]
 	depends = qtgraphicaleffects
 	recommends = qtimageformats