net: bt: Fix not showing any logs

Including logging/sys_log.h before net_core.h prevents SYS_LOG_LEVEL,
etc, to be set properly.

Change-Id: Iaa7aa98110aa455162836be1d9560fbfc03569df
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
1 file changed