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/build-support/fetchfirefoxaddon/default.nix

@@ -0,0 +1,44 @@
+{stdenv, unzip, jq, zip, fetchurl,writeScript,  ...}:
+
+{
+  name
+, url ? null
+, md5 ? ""
+, sha1 ? ""
+, sha256 ? ""
+, sha512 ? ""
+, fixedExtid ? null
+, hash ? ""
+, src ? ""
+}:
+
+let
+  extid = if fixedExtid == null then "nixos@${name}" else fixedExtid;
+  source = if url == null then src else fetchurl {
+    url = url;
+    inherit md5 sha1 sha256 sha512 hash;
+  };
+in
+stdenv.mkDerivation {
+  inherit name;
+
+  passthru = {
+    inherit extid;
+  };
+
+  builder = writeScript "xpibuilder" ''
+    source $stdenv/setup
+
+    header "firefox addon $name into $out"
+
+    UUID="${extid}"
+    mkdir -p "$out/$UUID"
+    unzip -q ${source} -d "$out/$UUID"
+    NEW_MANIFEST=$(jq '. + {"applications": { "gecko": { "id": "${extid}" }}, "browser_specific_settings":{"gecko":{"id": "${extid}"}}}' "$out/$UUID/manifest.json")
+    echo "$NEW_MANIFEST" > "$out/$UUID/manifest.json"
+    cd "$out/$UUID"
+    zip -r -q -FS "$out/$UUID.xpi" *
+    rm -r "$out/$UUID"
+  '';
+  nativeBuildInputs = [ unzip zip jq  ];
+}

pkgs/build-support/fetchfirefoxaddon/tests.nix

@@ -0,0 +1,21 @@
+{ testers, fetchFirefoxAddon, fetchurl, ... }:
+
+{
+  simple = testers.invalidateFetcherByDrvHash fetchFirefoxAddon {
+    name = "image-search-options";
+    # Chosen because its only 147KB
+    url = "https://addons.mozilla.org/firefox/downloads/file/3059971/image_search_options-3.0.12-fx.xpi";
+    sha256 = "sha256-H73YWX/DKxvhEwKpWOo7orAQ7c/rQywpljeyxYxv0Gg=";
+  };
+  overidden-source =
+    let
+      image-search-options = fetchurl {
+        url = "https://addons.mozilla.org/firefox/downloads/file/3059971/image_search_options-3.0.12-fx.xpi";
+        sha256 = "sha256-H73YWX/DKxvhEwKpWOo7orAQ7c/rQywpljeyxYxv0Gg=";
+      };
+    in
+    testers.invalidateFetcherByDrvHash fetchFirefoxAddon {
+      name = "image-search-options";
+      src = image-search-options;
+    };
+}