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/gmpy2/default.nix

@@ -0,0 +1,36 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, isPyPy
+, gmp
+, mpfr
+, libmpc
+}:
+
+let
+  pname = "gmpy2";
+  version = "2.1.2";
+in
+
+buildPythonPackage {
+  inherit pname version;
+
+  disabled = isPyPy;
+
+  src = fetchFromGitHub {
+    owner = "aleaxit";
+    repo = "gmpy";
+    rev = "gmpy2-${version}";
+    sha256 = "sha256-ARCttNzRA+Ji2j2NYaSCDXgvoEg01T9BnYadyqON2o0=";
+  };
+
+  buildInputs = [ gmp mpfr libmpc ];
+
+  pythonImportsCheck = [ "gmpy2" ];
+
+  meta = with lib; {
+    description = "GMP/MPIR, MPFR, and MPC interface to Python 2.6+ and 3.x";
+    homepage = "https://github.com/aleaxit/gmpy/";
+    license = licenses.gpl3Plus;
+  };
+}