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/python-modules/discid/default.nix

@@ -0,0 +1,25 @@
+{ lib, stdenv, libdiscid, buildPythonPackage, fetchPypi }:
+
+buildPythonPackage rec {
+  pname = "discid";
+  version = "1.2.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1fc6kvnqwaz9lrs2qgsp8wh0nabf49010r0r53wnsmpmafy315nd";
+  };
+
+  patchPhase =
+    let extension = stdenv.hostPlatform.extensions.sharedLibrary; in
+    ''
+      substituteInPlace discid/libdiscid.py \
+        --replace "_open_library(_LIB_NAME)" \
+                  "_open_library('${libdiscid}/lib/libdiscid${extension}')"
+    '';
+
+  meta = with lib; {
+    description = "Python binding of libdiscid";
+    homepage    = "https://python-discid.readthedocs.org/";
+    license     = licenses.lgpl3Plus;
+  };
+}