e2image: copy mmp block when create metadata only image

e2image in modes without data blocks copy (-r, -Q) doesn't copy
mmp block that leads to fsck error:

Superblock has invalid MMP magic.  Fix? no

This patch adds coping this block if mmp is enabled.

Change-Id: I66035ee394a0ff53b9959e82b3e47050f3bf1593
Signed-off-by: Artem Blagodarenko <artem.blagodarenko@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
4 files changed