Edits to explain that by default, DISTRO_FEATURES backfills
bluetooth support with Bluez5. If the user wants to use the
Bluez4 feature, they need to backfill consider Bluez5.
(From yocto-docs rev: f46331bf0de77941114ffb223f979987d281ed57)
Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>