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/ocaml-modules/irmin/mirage-graphql.nix

@@ -0,0 +1,21 @@
+{ buildDunePackage, irmin-mirage, irmin-graphql
+, mirage-clock, cohttp-lwt, lwt, uri, git
+}:
+
+buildDunePackage {
+  pname = "irmin-mirage-graphql";
+
+  inherit (irmin-mirage) version src useDune2;
+
+  propagatedBuildInputs = [
+    irmin-mirage
+    irmin-graphql
+    mirage-clock
+    cohttp-lwt
+    lwt
+    uri
+    git
+  ];
+
+  inherit (irmin-mirage) meta;
+}