Those are all fixes from the UnplugFest last week, fixing e.g. BT Mouse
reconnect problems after idle etc.

- update to bluez-4.88:
- Fix issue with HID channel reference count handling.
- Fix issue with daemon exit on badly formatted AT+VTS.
- Fix issue with crash while parsing of endpoint properties.
- Fix issue with possible crash on AVDTP Suspend request timeout.
- Fix issue with stopping inquiry before adapter is initialized.
- Fix issue with creating device object when connection fails.
- Fix issue with sending HCIDEVUP when adapter is already up.
- Fix issue with handling bonding IO channel closing.
- Fix agent cancellation in security mode 3 situations.
- Update pairing code to support management interface.
- require glib2 2.16 or newer