[PATCH] add eraseblock header support for mkfs.jffs2

[zhao, forrest]

Hi,

This patch added the eraseblock header support
for mkfs.jffs2.
In particular, the option
"--eraseblock-header" is used to specify the
eraseblock header size, the default is 28 bytes;
"--no-eraseblock-headers" is used to specify 
that no EBH is written to each erase block.

The patch is at:
http://www.infradead.org/~forrest/mkfs.jffs2.patch

Thanks,
Forrest