uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/applications/virtualization/qemu/utils.nix

@@ -0,0 +1,22 @@
+{ stdenv, installShellFiles, qemu }:
+
+stdenv.mkDerivation rec {
+  pname = "qemu-utils";
+  inherit (qemu) version;
+
+  nativeBuildInputs = [ installShellFiles ];
+  buildInputs = [ qemu ];
+  unpackPhase = "true";
+
+  installPhase = ''
+    mkdir -p "$out/bin"
+    cp "${qemu}/bin/qemu-img" "$out/bin/qemu-img"
+    cp "${qemu}/bin/qemu-io"  "$out/bin/qemu-io"
+    cp "${qemu}/bin/qemu-nbd" "$out/bin/qemu-nbd"
+
+    installManPage ${qemu}/share/man/man1/qemu-img.1.gz
+    installManPage ${qemu}/share/man/man8/qemu-nbd.8.gz
+  '';
+
+  inherit (qemu) meta;
+}