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/libuecc/default.nix

@@ -0,0 +1,22 @@
+{ lib, stdenv, fetchgit, cmake }:
+
+stdenv.mkDerivation rec {
+  version = "7";
+  pname = "libuecc";
+
+  src = fetchgit {
+    url = "git://git.universe-factory.net/libuecc";
+    rev = "refs/tags/v${version}";
+    sha256 = "1sm05aql75sh13ykgsv3ns4x4zzw9lvzid6misd22gfgf6r9n5fs";
+  };
+
+  nativeBuildInputs = [ cmake ];
+
+  meta = with lib; {
+    description = "Very small Elliptic Curve Cryptography library";
+    homepage = "https://git.universe-factory.net/libuecc";
+    license = licenses.bsd2;
+    platforms = platforms.unix;
+    maintainers = with maintainers; [ fpletz ];
+  };
+}