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/misc/gv/default.nix

@@ -0,0 +1,46 @@
+{ lib, stdenv, fetchurl, Xaw3d, ghostscriptX, perl, pkg-config, libiconv }:
+
+stdenv.mkDerivation rec {
+  pname = "gv";
+  version = "3.7.4";
+
+  src = fetchurl {
+    url = "mirror://gnu/gv/gv-${version}.tar.gz";
+    sha256 = "0q8s43z14vxm41pfa8s5h9kyyzk1fkwjhkiwbf2x70alm6rv6qi1";
+  };
+
+  configureFlags = lib.optionals stdenv.isDarwin [
+    "--enable-SIGCHLD-fallback"
+  ];
+
+  buildInputs = [
+    Xaw3d
+    ghostscriptX
+    perl
+    pkg-config
+  ] ++ lib.optionals stdenv.isDarwin [
+    libiconv
+  ];
+
+  patchPhase = ''
+    sed 's|\<gs\>|${ghostscriptX}/bin/gs|g' -i "src/"*.in
+    sed 's|"gs"|"${ghostscriptX}/bin/gs"|g' -i "src/"*.c
+  '';
+
+  doCheck = true;
+
+  meta = {
+    homepage = "https://www.gnu.org/software/gv/";
+    description = "PostScript/PDF document viewer";
+
+    longDescription = ''
+      GNU gv allows users to view and navigate through PostScript and
+      PDF documents on an X display by providing a graphical user
+      interface for the Ghostscript interpreter.
+    '';
+
+    license = lib.licenses.gpl3Plus;
+    maintainers = [ ];
+    platforms = lib.platforms.unix;
+  };
+}