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/development/libraries/qwt/default.nix

@@ -0,0 +1,33 @@
+{ lib, stdenv, fetchurl, qtbase, qtsvg, qttools, qmake }:
+
+stdenv.mkDerivation rec {
+  pname = "qwt";
+  version = "6.2.0";
+
+  outputs = [ "out" "dev" ];
+
+  src = fetchurl {
+    url = "mirror://sourceforge/qwt/qwt-${version}.tar.bz2";
+    sha256 = "sha256-kZT2UTlV0P1zAPZxWBdQZEYBl6urGpL6EnpnpLC3FTA=";
+  };
+
+  propagatedBuildInputs = [ qtbase qtsvg qttools ];
+  nativeBuildInputs = [ qmake ];
+
+  postPatch = ''
+    sed -e "s|QWT_INSTALL_PREFIX.*=.*|QWT_INSTALL_PREFIX = $out|g" -i qwtconfig.pri
+  '';
+
+  qmakeFlags = [ "-after doc.path=$out/share/doc/qwt-${version}" ];
+
+  dontWrapQtApps = true;
+
+  meta = with lib; {
+    description = "Qt widgets for technical applications";
+    homepage = "http://qwt.sourceforge.net/";
+    # LGPL 2.1 plus a few exceptions (more liberal)
+    license = lib.licenses.qwt;
+    platforms = platforms.unix;
+    maintainers = [ maintainers.bjornfor ];
+  };
+}