os-prober: add missing dmraid dependency

If this is not done, dmraid is likely to not find OSes on RAID.

pkgs/tools/misc/os-prober/default.nix

@@ -6,6 +6,7 @@ cryptsetup, # cryptsetup
 libuuid,    # blkid and blockdev
 udev,    # udevadm udevinfo
 ntfs3g,     # ntfs3g
+dmraid,     # dmraid
 lvm2        # lvs
 }:
 
@@ -55,7 +56,7 @@ stdenv.mkDerivation rec {
     done;
     for file in $out/bin/*; do
       wrapProgram $file \
-        --suffix PATH : ${stdenv.lib.makeBinPath [ grub2 udev coreutils cryptsetup libuuid ntfs3g lvm2 ]} \
+        --suffix PATH : ${stdenv.lib.makeBinPath [ grub2 udev coreutils cryptsetup libuuid ntfs3g lvm2 dmraid ]} \
         --run "[ -d /var/lib/os-prober ] || mkdir /var/lib/os-prober"
     done;
   '';