LU-14119 lfsck: check linkea if it's newly added

LU-14119 lfsck: check linkea if it's newly added

In LFSCK phase one, if new linkea entry is added, and final linkea
entry count is more than one, add file in trace file, so that the
linkea sanity will be checked in phase two.

And in phase two check, if link parent FID can't be mapped to valid
inode, remove it from linkea.

Add sanity-lfsck 1d, which changed parent directory FID in LMA,
therefore the FID in LMA mismatches with parent FID in child linkea,
verify LFSCK can fix such inconsistency.

Signed-off-by: Lai Siyao <lai.siyao@whamcloud.com>
Change-Id: I315983d262110c1e36c3893fa2e51925d96c51a7
Reviewed-on: https://review.whamcloud.com/41261
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Hongchao Zhang <hongchao@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>