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/graphics/zgv/default.nix

@@ -0,0 +1,42 @@
+{ lib, stdenv, fetchurl, fetchpatch, pkg-config, SDL, SDL_image, libjpeg, libpng, libtiff }:
+
+stdenv.mkDerivation rec {
+  pname = "zgv";
+  version = "5.9";
+  src = fetchurl {
+    url = "https://www.svgalib.org/rus/zgv/${pname}-${version}.tar.gz";
+    sha256 = "1fk4i9x0cpnpn3llam0zy2pkmhlr2hy3iaxhxg07v9sizd4dircj";
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ SDL SDL_image libjpeg libpng libtiff ];
+
+  hardeningDisable = [ "format" ];
+
+  makeFlags = [
+    "BACKEND=SDL"
+  ];
+
+  patches = [
+    (fetchpatch {
+    url = "https://foss.aueb.gr/mirrors/linux/gentoo/media-gfx/zgv/files/zgv-5.9-libpng15.patch";
+    sha256 = "1blw9n04c28bnwcmcn64si4f5zpg42s8yn345js88fyzi9zm19xw";
+    })
+    ./switch.patch
+  ];
+
+  patchFlags = [ "-p0" ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp src/zgv $out/bin
+  '';
+
+  meta = with lib; {
+    homepage = "http://www.svgalib.org/rus/zgv/";
+    description = "Picture viewer with a thumbnail-based selector";
+    license = licenses.gpl2;
+    maintainers = [ maintainers.vrthra ];
+    platforms = platforms.linux;
+  };
+}

pkgs/applications/graphics/zgv/switch.patch

@@ -0,0 +1,14 @@
+GCC complains
+
+diff -ur src/zgv_io.c src/zgv_io.c
+--- src/zgv_io.c	2005-01-20 15:07:46.000000000 -0800
++++ src/zgv_io.c	2016-06-29 10:19:40.169897611 -0700
+@@ -645,7 +645,7 @@
+         case SDLK_INSERT:	return(RK_INSERT);
+         case SDLK_DELETE:	return(RK_DELETE);
+         case SDLK_RETURN:	return(RK_ENTER);
+-        default:
++        default: ;
+           /* stop complaints */
+         }
+