qtwayland: depend on xkbcommon again

Build for qemux86 fails with:

| Collected errors:
|  * satisfy_dependencies_for: Cannot satisfy the following dependencies for packagegroup-webos-ports-extended:
|  * libxkbcommon0 (>= 0.3.1) * libxkbcommon0 (>= 0.3.1) *
|  * opkg_install_cmd: Cannot install package packagegroup-webos-ports-extended.

Signed-off-by: Simon Busch <morphis@gravedo.de>
packagegroup-webos-ports-extended: drop web-apps

* web-apps will be added to the preware feeds soon

Signed-off-by: Simon Busch <morphis@gravedo.de>