Q2C24 bricks B2s

[Mitch Bradley]

Q2C24 bricks B2 machines.  Don't use it.  Q2C25 has been released, which 
fixes that problem.

http://wiki.laptop.org/go/OLPC_Firmware_q2c25

Q2C24 has been removed from the download site, and the links to the 
version of olpc-auto.zip that contains Q2C24 have been broken - at least 
the ones I found - pending replacement with Q2C25.

Any B2 machines in the field that have been bricked (I know of 2 so far) 
will need to be returned to Cambridge.

Sorry for this screwup.  I neglected to test Q2C24 on B2.

Q2C25 has been tested on B1, B2, B3, and B4.