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/servers/sql/pgpool/default.nix

@@ -0,0 +1,34 @@
+{ lib, stdenv, fetchurl, postgresql, openssl, pam ? null, libmemcached ? null }:
+
+stdenv.mkDerivation rec {
+  pname = "pgpool-II";
+  version = "4.3.2";
+
+  src = fetchurl {
+    name = "${pname}-${version}.tar.gz";
+    url = "http://www.pgpool.net/download.php?f=${pname}-${version}.tar.gz";
+    sha256 = "02jg0c6k259i0r927dng9h0y58q965swshg2c9mzqhazcdiga5ap";
+  };
+
+  buildInputs = [ postgresql openssl pam libmemcached ];
+
+  configureFlags = [
+    "--sysconfdir=/etc"
+    "--localstatedir=/var"
+    "--with-openssl"
+  ] ++ lib.optional (pam != null) "--with-pam"
+    ++ lib.optional (libmemcached != null) "--with-memcached=${libmemcached}";
+
+  installFlags = [
+    "sysconfdir=\${out}/etc"
+  ];
+
+  enableParallelBuilding = true;
+
+  meta = with lib; {
+    homepage = "http://pgpool.net/mediawiki/index.php";
+    description = "A middleware that works between postgresql servers and postgresql clients";
+    license = licenses.free;
+    platforms = platforms.linux;
+  };
+}