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/data/misc/elliptic_curves/default.nix

@@ -0,0 +1,50 @@
+{ lib, stdenv
+, fetchurl
+, python3
+}:
+
+stdenv.mkDerivation rec {
+  pname = "elliptic_curves";
+  version = "0.8.1";
+
+  src = fetchurl {
+    url = "mirror://sageupstream/${pname}/${pname}-${version}.tar.bz2";
+    sha256 = "0l7xh4abw5sb4d37r0ylr3vwb88fpx2zrvfm5ql0c7yrv5q59fjz";
+  };
+
+
+  # Script that creates the sqlite database from the allcurves textfile
+  spkg-install = fetchurl {
+    url = "https://git.sagemath.org/sage.git/plain/build/pkgs/${pname}/spkg-install.py?id=07d6c37d18811e2b377a9689790a7c5e24da16ba";
+    sha256 = "116g684i6mvs11fvb6fzfsr4fn903axn31vigdyb8bgpf8l4hvc5";
+  };
+
+  installPhase = ''
+    # directory layout as spkg-install.py expects
+    dir="$PWD"
+    cd ..
+    ln -s "$dir" "src"
+
+    # environment spkg-install.py expects
+    mkdir -p "$out/share"
+    export SAGE_SHARE="$out/share"
+    export PYTHONPATH=$PWD
+
+    ${python3.interpreter} ${spkg-install}
+  '';
+
+  meta = with lib; {
+    description = "Databases of elliptic curves";
+    longDescription = ''
+      Includes two databases:
+
+       * A small subset of the data in John Cremona's database of elliptic curves up
+         to conductor 10000. See http://www.warwick.ac.uk/~masgaj/ftp/data/ or
+         http://sage.math.washington.edu/cremona/INDEX.html
+       * William Stein's database of interesting curves
+    '';
+    license = licenses.gpl2;
+    platforms = platforms.all;
+    maintainers = teams.sage.members;
+  };
+}