Re-export the example custom MultiEffect component with the latest QQEM
version. Also add copyright headings into the project.
Task-number: QTBUG-111150
Pick-to: 6.5
Change-Id: I27f6ad2edc220a7f5f625f6dae23159318fa20e2
Reviewed-by: Kaj Grönholm <kaj.gronholm@qt.io>
Add CustomMultiEffect QQEM project and the effect exported from it into
the MultiEffect testbed example. This can be used to validate the QQEM
MultiEffect node compatibility with the Qt Quick MultiEffect.
Task-number: QTBUG-109740
Pick-to: 6.5
Change-Id: I596bf54316ab70b85b1ace33a433a4109c43b239
Reviewed-by: Kaj Grönholm <kaj.gronholm@qt.io>