qtwebengine: add a package config to enable proprietary codecs
qtwebengine: add a package config to enable proprietary codecs

Add a package config that allow to enable proprietary codecs for h264
support.

Signed-off-by: Alban Bedel <825cb1d71292b66c34fe6b2f34d0838d6f1a9969@avionic-design.de>

kraj/meta-qt5,sapiippo/meta-qt5,meta-qt5/meta-qt5,meta-qt5/meta-qt5,kraj/meta-qt5,schnitzeltony/meta-qt5,schnitzeltony/meta-qt5,sapiippo/meta-qt5