Update libimobiledevice, libplist, libusbmuxd and usbmuxd

Updated libraries and tools to support connectivity of Apple devices,
such as iPads, iPods and iPhones.

Signed-off-by: Lukasz Baj <l.baj@radytek.com>
Merge pull request #593 from lukbaj/master

Update libimobiledevice, libplist, libusbmuxd and usbmuxd