ofono: prefer our version instead of newer one from oe-core

Signed-off-by: Simon Busch <morphis@gravedo.de>
db8: add rdepends on bash

WARNING: QA Issue: db8-tests requires /bin/bash, but no providers in its RDEPENDS [file-rdeps]
WARNING: QA Issue: db8 requires /bin/bash, but no providers in its RDEPENDS [file-rdeps]

Signed-off-by: Simon Busch <morphis@gravedo.de>
webos-telephonyd: add dependency on luna-prefs

WARNING: QA Issue: webos-telephonyd rdepends on luna-prefs, but it isn't a build dependency? [build-deps]

Signed-off-by: Simon Busch <morphis@gravedo.de>
ofono: use ${B} rather than ${SEPB}

* overriding ${B} is possible again in dizzy and using ${SEPB} doesn't
  seem to work

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