arago.conf: clean up qtbase PACKAGECONFIG a bit
arago.conf: clean up qtbase PACKAGECONFIG a bit

xkbcommon is no longer needed.

Signed-off-by: Denys Dmytriyenko <d29de71aea38aad3a87d486929cb0aad173ae612@ti.com>

rcn-ee/meta-arago,rcn-ee/meta-arago,rcn-ee/meta-arago,rcn-ee/meta-arago,rcn-ee/meta-arago