package/qt5webengine: add missing opus dependency
The package opus is selected but it is not listed in the dependencies.
This adds opus to QT5WEBENGINE_DEPENDENCIES.
Fixes:
$ make qt5webengine
(...)
ERROR: Feature 'webengine-system-opus' was enabled, but the pre-condition 'config.unix && libs.webengine-opus' failed.
Signed-off-by: Gaël PORTAY <gael.portay@rtone.fr>
Signed-off-by: Arnout Vandecappelle <arnout@rnout.be>