#1024 lzma compression support for cramfs

[Gianluigi Tiesi]

currently I have no working tool to extract some lzma compressed cramfs images, it should be straightforward to decompress files using lzma decode instead of inflate,

some infos here http://code.google.com/p/firmware-mod-kit/issues/detail?id=2

flags >> 14
0 compression none
1 compression zlib
2 compression lzma

I known it's a modification, but it would be appreciated if not so difficult