fstools: update to the latest version

fstools: update to the latest version

84965b92f635 blockd: print symlink error code and string message
62c578c22f9d blockd: report "target" path as "mount" for autofs available mounts
d1f1f2b38fa1 block: remove mount target file if it's a link
830441d790d6 blockd: remove symlink linkpath file if it's a dir or link
c80f7002114f libfstools/mtd: attempt to read from OOB data if empty space is found

Signed-off-by: Felix Fietkau <nbd@nbd.name>
(cherry picked from commit b7d6e80feea21aac80d5bd25dc3a0dd5b148fec9)