Bluetooth: Fix bt_gatt_attr_read_chrc for UUID 128 bits

When reading a characteristic attribute which contain a 128 bits UUID the
size of the elements were counting only the UUID alone not other fields
that are part of the value causing invalid responses to be sent.

Change-Id: I7474531f586ba19788eb9e0ed59555c5d7672176
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
1 file changed