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/tools/build-managers/rebar3/rebar_ignore_deps.erl

@@ -0,0 +1,43 @@
+%% This module, when loaded as a plugin, overrides the default `install_deps`
+%% provider and erases the dependencies from the rebar3 state, when
+%% REBAR_IGNORE_DEPS is true.
+
+-module(rebar_ignore_deps).
+
+-export([init/1, do/1, format_error/1]).
+
+init(State0) ->
+    case os:getenv("REBAR_IGNORE_DEPS", "") of
+        "" ->
+            {ok, State0};
+        _ ->
+            do_init(State0)
+    end.
+
+do_init(State0) ->
+    State1 = rebar_state:allow_provider_overrides(State0, true),
+    Provider = providers:create(
+                 [
+                  {name, install_deps}, %% override the default install_deps provider
+                  {module, ?MODULE},
+                  {bare, false},
+                  {deps, [app_discovery]},
+                  {example, undefined},
+                  {opts, []},
+                  {short_desc, ""},
+                  {desc, ""}
+                 ]),
+    State2 = rebar_state:add_provider(State1, Provider),
+    {ok, rebar_state:allow_provider_overrides(State2, false)}.
+
+do(State0) ->
+    io:format("Ignoring deps...~n"),
+    Profiles = rebar_state:current_profiles(State0),
+    State = lists:foldl(fun(P, Acc0) ->
+                                 Acc = rebar_state:set(Acc0, {deps, P}, []),
+                                 rebar_state:set(Acc, {parsed_deps, P}, [])
+                         end, State0, Profiles),
+    {ok, State}.
+
+format_error(Reason) ->
+    io_lib:format("~p", [Reason]).