obexd/client: Add support for MAP Event Report 1.1
This adds support for Event Report 1.1 of MAP 1.2 which includes the
following atributes: Subject, datetime, sender_name, priority.
Adds null check for event values and fix leaking memory on event attributes.
Taken from upstream:
http://git.kernel.org/cgit/bluetooth/bluez.git/commit/?id=
bb57098100a9f47b1a0f6e2be8aa0a85a2d33384
http://git.kernel.org/cgit/bluetooth/bluez.git/commit/?id=
60ebd27931f2f9241e1ddad521af36c0ed991524
http://git.kernel.org/cgit/bluetooth/bluez.git/commit/?id=
7e03d3d92f726176718d855b771c95702726014c
Change-Id: If007c3fb03cfc36295e7424e6585f96b4a09010f