[Cooker] rotflags and initrd

[Borsenkow Andrej]

If kernel mounts rootfs directly, you can pass mount options via
rootflags boot parameter, like

linux rootflags=data=journal

as example for ext3.

When root is mounted in initrd these flags are currently ignored for all
I can tell, at least, man page for nash shows no options here:

mount [--ro] -t type device mntpoint

Unfortunately, parsing /proc/cmdline in nash may be non-trivial and
probably requires some external commands.

-andrej