[PATCH] dontdiff file sorted in alphabet order

Documentation/dontdiff is a little messy.  Here is a patch to sort the
content of that file in alphabetical

Signed-off-by: Nguyen Anh Quynh <aquynh@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>