Add build information to OTA script

Outputs:

*   Version: Build 0
*   Device: mako (Nexus 4)

OR

*   Version: Nightly Mar-31-13
*   Device: mako (Nexus 4)

OR

******************************************
************ UNOFFICIAL BUILD ************
******************************************
*   Compiled: Sun Mar 31 20:26:39 CEST 2013
*   Device: mako (Nexus 4)

Change-Id: I4e7829b6b7817f33e00256fe1af28444c51e8a36
Signed-off-by: KhasMek <Boushh@gmail.com>