Fix: wrong config.xml file used to build widget

Fix: wrong config.xml file used to build widget

Change-Id: I6468f4d6917a7eeb0a3fe34555e1eb3cdbf969f2
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/11959
Reviewed-by: Stéphane Desneux <stephane.desneux@iot.bzh>
Reviewed-by: Scott Murray <scott.murray@konsulko.com>
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>