nilfs2-kmod9 v1.36 release

• Backport a fix for a potential block overflow during FITRIM operations that could lead to a system hang:
  • Fix potential block overflow that cause system hang
• Backport fixes to eliminate kernel-doc warnings by adding missing keywords and converting comments for on-disk structures to the proper kernel-doc format:
  • Fix missing struct keywords in nilfs2_api.h kernel-doc
  • Convert nilfs_super_block to kernel-doc