mkfs.f2fs: add -r (fake_seed) flag

r flag sets the checkpointing seed to 0 (initially used to
remove randomness for apex generation)

Signed-off-by: Theotime Combes <tcombes@google.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
4 files changed