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/audio/gxplugins-lv2/default.nix

@@ -0,0 +1,34 @@
+{ lib, stdenv, fetchFromGitHub, xorg, xorgproto, cairo, lv2, pkg-config }:
+
+stdenv.mkDerivation rec {
+  pname = "GxPlugins.lv2";
+  version = "0.9";
+
+  src = fetchFromGitHub {
+    owner = "brummer10";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "02fksl8wr443ygwgcd1c2zab8kp67a6ps12k71ysqx7szv4zq877";
+    fetchSubmodules = true;
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [
+    xorg.libX11 xorgproto cairo lv2
+  ];
+
+  installFlags = [ "INSTALL_DIR=$(out)/lib/lv2" ];
+
+  configurePhase = ''
+    for i in GxBoobTube GxValveCaster; do
+      substituteInPlace $i.lv2/Makefile --replace "\$(shell which echo) -e" "echo -e"
+    done
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/brummer10/GxPlugins.lv2";
+    description = "A set of extra lv2 plugins from the guitarix project";
+    maintainers = [ maintainers.magnetophon ];
+    license = licenses.gpl3Plus;
+  };
+}