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/postgresql/ext/pg_safeupdate.nix

@@ -0,0 +1,27 @@
+{ lib, stdenv, fetchFromGitHub, postgresql }:
+
+stdenv.mkDerivation rec {
+  pname = "pg-safeupdate";
+  version = "1.4";
+
+  buildInputs = [ postgresql ];
+
+  src = fetchFromGitHub {
+    owner  = "eradman";
+    repo   = pname;
+    rev    = version;
+    sha256 = "sha256-1cyvVEC9MQGMr7Tg6EUbsVBrMc8ahdFS3+CmDkmAq4Y=";
+  };
+
+  installPhase = ''
+    mkdir -p $out/bin # for buildEnv, see https://github.com/NixOS/nixpkgs/issues/22653
+    install -D safeupdate.so -t $out/lib
+  '';
+
+  meta = with lib; {
+    description = "A simple extension to PostgreSQL that requires criteria for UPDATE and DELETE";
+    homepage    = "https://github.com/eradman/pg-safeupdate";
+    platforms   = postgresql.meta.platforms;
+    license     = licenses.postgresql;
+  };
+}