squashfs-tools: Add support for LZO and LZ4 compression
For systems that want to optimize for speed rather than size, LZO is
usually a better choice than gzip or XZ. Kernel support for LZO has
been available since 2.6.29.
LZ4 support isn't in the mainline kernel yet, but we might as well add
it now for those who want to experiment with it.
Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
