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/science/math/ecm/default.nix

@@ -0,0 +1,31 @@
+{ lib, stdenv, fetchurl, gmp, m4 }:
+
+let
+  pname = "ecm";
+  version = "7.0.4";
+  name = "${pname}-${version}";
+in
+
+stdenv.mkDerivation {
+  inherit name;
+
+  src = fetchurl {
+    url = "http://gforge.inria.fr/frs/download.php/file/36224/ecm-${version}.tar.gz";
+    sha256 = "0hxs24c2m3mh0nq1zz63z3sb7dhy1rilg2s1igwwcb26x3pb7xqc";
+  };
+
+  # See https://trac.sagemath.org/ticket/19233
+  configureFlags = lib.optional stdenv.isDarwin "--disable-asm-redc";
+
+  buildInputs = [ m4 gmp ];
+
+  doCheck = true;
+
+  meta = {
+    description = "Elliptic Curve Method for Integer Factorization";
+    license = lib.licenses.gpl2Plus;
+    homepage = "http://ecm.gforge.inria.fr/";
+    maintainers = [ lib.maintainers.roconnor ];
+    platforms = with lib.platforms; linux ++ darwin;
+  };
+}