Bump version

Change-Id: I83a2f252c5a0f105f4d0984652e41049009f8499
Merge remote-tracking branch 'origin/5.3' into dev

Conflicts:
	.qmake.conf

Change-Id: Ibcd05d8dcf19133830920d9eba3fa1450b3d3de1
Avoid direct GL calls in Quick1

Change-Id: I72c78f3c2920d7c27c013eaad39259a7c7009940
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
QDeclarativeError::toString: improve handling of empty urls.

"file::2:23: ..." is strange to read. Show "<Unknown File>:2:23: ..." instead,
by treating empty urls (including "file:") as unknown, and by still showing
line and column numbers in such a case.

This change makes it possible for QUrl::fromLocalFile("") to return an
empty url rather than "file:", which this module was relying upon in the tests.

Change-Id: Id6d8aaa73673283cb65cbd1316dca77f859a3f8f
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>