This source package can build in scratchbox:
make nokia_rx51_config
make

This won't build the padded image, since the coreutils in maemo SDK 
does not include the command truncate.


The binary image included is built in by a usual cross compile chain
outside of scratchbox, as described at: 
http://al.robotfuzz.com/~al/maemo/u-boot/

export CROSS_COMPILE=/usr/local/arm-2008q1/bin/arm-none-linux-gnueabi-
make nokia_rx51_config
make

