package/lftp: bump to version 4.9.2

package/lftp: bump to version 4.9.2

Update indentation in hash file (two spaces)

Extract from NEWS:

- mkdir: fixed exit code with -f option.
- ftp: made ftp:use-pret setting tri-boolean.
- get/mget/put/mput: don't try next files after error if cmd:fail-exit
  is true.
- get/mget: fixed -O option with remote URL and xfer:use-temp-file being
  true.
- mirror: disallow empty patterns; don't delete "..".
- mirror: fixed --on-change with --reverse.
- sftp: fixed a bug with truncated files when packets are reordered
  (finally).

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>