Update bluez to 5.50
Remove Nicolas Thill as maintainer since he hasn't replied to numerous of
reviews requests for several packages within months.
Drop obsolete configuration file
Add patch for LE devices

Source: https://git.archlinux.org/svntogit/packages.git/plain/trunk/refresh_adv_manager_for_non-LE_devices.diff?h=packages/bluez

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>

By default bluez allows the printing subsystem to communicate
via dbus. This refers to the group lp which isn't available
on OpenWrt and makes dbus fail to start.

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>