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>

nixos/tests/postgis.nix

@@ -0,0 +1,29 @@
+import ./make-test-python.nix ({ pkgs, ...} : {
+  name = "postgis";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ lsix ];
+  };
+
+  nodes = {
+    master =
+      { pkgs, ... }:
+
+      {
+        services.postgresql = let mypg = pkgs.postgresql_11; in {
+            enable = true;
+            package = mypg;
+            extraPlugins = with mypg.pkgs; [
+              postgis
+            ];
+        };
+      };
+  };
+
+  testScript = ''
+    start_all()
+    master.wait_for_unit("postgresql")
+    master.sleep(10)  # Hopefully this is long enough!!
+    master.succeed("sudo -u postgres psql -c 'CREATE EXTENSION postgis;'")
+    master.succeed("sudo -u postgres psql -c 'CREATE EXTENSION postgis_topology;'")
+  '';
+})