ubifs-utils: Adapt recovery subsystem in libubifs

ubifs-utils: Adapt recovery subsystem in libubifs

Adapt recovery subsystem(replay.c, recovery.c) in libubifs, compared with
linux kernel implementations:
 1. Remove authentication related implementations
    (eg. authenticate_sleb_hash), authentication is not supported in fsck
    for now.
 2. Add explicit type conversions(const char *) to avoid compiling
    warnings.
 3. Replace implementations of inode_fix_size() with ubifs_assert(0),
    authentication is not supported in fsck, so this function won't
    be invoked.
 4. Remove unused ubifs_clean_lebs() and ubifs_write_rcvrd_mst_node().
 5. Adapt fix_unclean_leb/recover_head/fix_size_in_place to ignore
    %-EBADMSG, subsequent steps will check nodes in lpt/main area
    carefully.

Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>