altlinux: Use relative paths and fix rootfs variable.
altlinux: Use relative paths and fix rootfs variable.

Change paths in fstab to be relative to the root and fix a wrong
rootfs_path value.

Signed-off-by: Serge Logvinov <5700a1889024b9ff392cd464a1be037a7dae39db@gmail.com>
Acked-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

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