[KERNEL][VFS] Add fiu_stat()
[KERNEL][SYSCALL] Add stat()
[KERNEL][SYSCALL] Add fstat()
[USERLAND][LIBC] Add struct stat definition
[USERLAND][LIBC] Add syscall stat()
[USERLAND][LIBC] Add syscall fstat()
[USERLAND][LIBC] Add message for stat()
[USERLAND][LIBFIU] Now support stat request
[USERLAND][DRV] Ext2 now support stat()