Add qtwaylandscanner to the SDK

Add qtwaylandscanner to the SDK

This is required by qt apps in recent master (e.g. launcher).
Add it to the SDK.

Bug-AGL: SPEC-3467
Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Change-Id: I165428d25fd9b46d2d0425e0caf8b07752178c8f
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/24908
Reviewed-by: Scott Murray <scott.murray@konsulko.com>
Reviewed-by: Marius Vlad <marius.vlad@collabora.com>
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-boot-test: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>