x-load and u-boot integrated into OE build process

Hi,

As of today OE will build x-load, MLO and u-boot binaries for you
everytime you ask it to build a filesystem image.

Both u-boot and x-load are being built from the sources available from
http://www.sakoman.net/cgi-bin/gitweb.cgi which should have the latest
and greatest versions publically available.

regards,

Koen