[os-prober/f21] (2 commits) ...Fix parsing grub2's initrd/linux variations, rhbz #1108344

[Hedayat Vatankhah]

Summary of changes:

  b7ed0ee... Silence first umount try if it failed (*)
  bbf80c8... Fix parsing grub2's initrd/linux variations, rhbz #1108344 (*)

(*) This commit already existed in another branch; no separate mail sent