Add a libnotify/gtk popup system to bluetooth-frwk.

Add a libnotify/gtk popup system to bluetooth-frwk.

This is helping having Bluetooth popups with no OSP application dependencies (bt-syspopup and osp-launcher) and libnotify/gtk on the patform.

	- Add bcond_whith bluetooth_frwk_libnotify in bluetooth-frwk.spec.
	- Add requires to bluetooth-tools needed for bt-core/bt_core.c (calls to /usr/etc/bluetooth/bt-*.sh)
	- Add compilation directive LIBNOTIFY_SUPPORT.
	- Remove  bt-syspopup dependencies with LIBNOTIFY_SUPPORT directive.
	- Modify bt-service/bt-service-agent.c in order to use bt-syspopup or libnotify (with compilation directive)
	- Add bt-service/bt-popup.c to display libnotify/gtk popups.
	- Add errno to bt-service/bt-service-rfcomm-client.c.

https://bugs.tizen.org/jira/browse/TWFD-3

Signed-off-by: Victor Hakoun <victor.hakoun@eurogiciel.fr>