patch from pgrayson:

patch from pgrayson:

 This patch does a couple mtd related things:

* Updates to the latest (2005/01/22) mtd from debian.org

* Fixes weird behavior where mkfs.jffs2 built for target was put into the staging dir.

* Shows the mtd package in the package selection menu. When mtd is enabled, the various mtd utilities appear and can be individually selected.

* Added a config item for sumtool, which is part of the mtd-utils and helps manage the new summary feature in jffs2 images.

* Fixed mtd build dependency problem. The mtd utils dynamically link with libz.so, therefore the zlib package is prerequisite for any of the mtd utilities.