storage/lvm: minor fix for lvs command building
storage/lvm: minor fix for lvs command building

Do not prepend 'sudo' each time - do a copy of array if that's
necessary.

marmarek/qubes-core-admin,QubesOS/qubes-core-admin,QubesOS/qubes-core-admin,QubesOS/qubes-core-admin,marmarek/qubes-core-admin,marmarek/qubes-core-admin