misc: fix compile warnings on master branch

Fix compile warnings found on the master branch when using LLVM.

- Add missing format string when using the libintl _() macro
- include <limits.h> header to get PATH_MAX definition
- fix format vs. variable mismatches
- add header block for create_inode.c file
- remove use of bzero(), use ext2fs_get_memzero() instead

Signed-off-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
debugfs: fix two warning messages when compiling with LLVM

This commit fixes two warning messages when compiling with LLVM.

Reported-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>