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/librttopo/default.nix

@@ -0,0 +1,32 @@
+{ lib
+, stdenv
+, fetchFromGitea
+, autoreconfHook
+, geos
+}:
+
+stdenv.mkDerivation rec {
+  pname = "librttopo";
+  version = "1.1.0";
+
+  outputs = [ "out" "dev" ];
+
+  src = fetchFromGitea {
+    domain = "git.osgeo.org/gitea";
+    owner = "rttopo";
+    repo = "librttopo";
+    rev = "librttopo-${version}";
+    sha256 = "0h7lzlkn9g4xky6h81ndy0aa6dxz8wb6rnl8v3987jy1i6pr072p";
+  };
+
+  nativeBuildInputs = [ autoreconfHook ];
+
+  buildInputs = [ geos ];
+
+  meta = with lib; {
+    description = "RT Topology Library";
+    homepage = "https://git.osgeo.org/gitea/rttopo/librttopo";
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ dotlambda ];
+  };
+}