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/libpqxx/6.nix

@@ -0,0 +1,30 @@
+{ lib, stdenv, fetchFromGitHub, postgresql, doxygen, xmlto, python3, gnused }:
+
+stdenv.mkDerivation rec {
+  pname = "libpqxx";
+  version = "6.4.8";
+
+  src = fetchFromGitHub {
+    owner = "jtv";
+    repo = pname;
+    rev = version;
+    hash = "sha256-ybnW9ip1QVadmbYLP+gvo49k9ExHfnsOhSnI6NjsAQk=";
+  };
+
+  nativeBuildInputs = [ gnused python3 ];
+  buildInputs = [ postgresql doxygen xmlto ];
+
+  preConfigure = ''
+    patchShebangs .
+  '';
+
+  configureFlags = [ "--enable-shared" ];
+
+  meta = {
+    description = "A C++ library to access PostgreSQL databases";
+    homepage = "http://pqxx.org/development/libpqxx/";
+    license = lib.licenses.bsd3;
+    platforms = lib.platforms.unix;
+    maintainers = [ lib.maintainers.eelco ];
+  };
+}