bluez4: 4.39 -> 4.56

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

diff --git a/meta/packages/bluez/bluez4_4.39.bb b/meta/packages/bluez/bluez4_4.56.bb
similarity index 100%
rename from meta/packages/bluez/bluez4_4.39.bb
rename to meta/packages/bluez/bluez4_4.56.bb