ofono: RRECOMMENDS tun.ko & APN database

ofono: RRECOMMENDS tun.ko & APN database

- kernel-module-tun is needed so that ofono can create the
  ppp network interface

- mobile-broadband-provider-info is needed as an explicit
  dependency even though it is in DEPENDS, because it's
  just an xml database, and the DEPENDS simply allows
  ofono to figure out its location in the file system
  (using pkg-config during configure). But there is no
  shared library dependency or so for bitbake to figure
  out this runtime dependency.
  We make it a recommendation only, so that it can still
  be removed from filesystem images in case people build
  images that don't need the provider database (and e.g.
  hard-code APNs for specific use-cases)

(From OE-Core rev: 1cb0eb9a013ad8a4092f610faeab2ee2720b9e66)

Signed-off-by: André Draszik <git@andred.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>