Btrfs-progs: add support for the compression property

Btrfs-progs: add support for the compression property

With this property, one can enable compression for individual files
without the need to mount the filesystem with the compress or
compress-force options, and specify the compression algorithm.

When applied against a directory, files created under that directory
will inherit the compression property.

This requires the corresponding kernel patch, which adds the support
for setting and getting properties and implements the compression
property.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>