Build identification.

[GoogleCodeExporter]

At the start of the build process a file is created (or truncated) in the 
target system (as build-space/rootfs/etc/rebuild_info) with the contents 
showing the rebuild version identification and the tool version used to create 
it.

An example line would look like this:
Rebuilt: custom_image_00010 With: Firmware Mod Kit (build) v0.68 beta, (c)2010 
Jeremy Collake

Original issue reported on code.google.com by michael....@gmail.com on 26 Feb 2011 at 5:23