mkfs.f2fs: add quite mode, -q
mkfs.f2fs: add quite mode, -q

This patch add a quite mode as -q.

Change-Id: I853ddafdaa5e892d11132e7f9782e053c82ed7fe
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Conflicts:
	mkfs/f2fs_format_main.c

schqiushui/android_external_f2fs-tools,schqiushui/android_external_f2fs-tools