fuse2 + sample

usage:

linux/samples/fuse2/loraw -2 -p -t ~/mnt/fuse/

options:

 -d: debug
 -s: single threaded
 -b: FUSE_DEV_IOC_CLONE (v1)
 -p: use ioctl for device I/O (v2)
 -m: use "map read" transferring offset into file instead of actual data
 -1: use regular fuse
 -2: use experimental fuse2
 -t: use shared memory instead of threads

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>