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/build-maven.nix

@@ -0,0 +1,81 @@
+{ stdenv, maven, runCommand, writeText, fetchurl, lib, requireFile }:
+/* Takes an info file generated by mvn2nix
+ * (https://github.com/NixOS/mvn2nix-maven-plugin) and builds the maven
+ * project with it.
+ *
+ * repo: A local maven repository with the project's dependencies.
+ *
+ * settings: A settings.xml to pass to maven to use the repo.
+ *
+ * build: A simple build derivation that uses mvn compile and package to build
+ *        the project.
+ */
+infoFile: let
+  info = lib.importJSON infoFile;
+
+  script = writeText "build-maven-repository.sh" ''
+    ${lib.concatStrings (map (dep: let
+      inherit (dep) sha1 groupId artifactId version metadata repository-id;
+
+      versionDir = dep.unresolved-version or version;
+      authenticated = dep.authenticated or false;
+      url = dep.url or "";
+
+      fetch = if (url != "") then ((if authenticated then requireFile else fetchurl) {
+        inherit url sha1;
+      }) else "";
+
+      fetchMetadata = (if authenticated then requireFile else fetchurl) {
+        inherit (metadata) url sha1;
+      };
+    in ''
+      dir=$out/$(echo ${groupId} | sed 's|\.|/|g')/${artifactId}/${versionDir}
+      mkdir -p $dir
+
+      ${lib.optionalString (fetch != "") ''
+        ln -sv ${fetch} $dir/${fetch.name}
+      ''}
+      ${lib.optionalString (dep ? metadata) ''
+        ln -svf ${fetchMetadata} $dir/maven-metadata-${repository-id}.xml
+        ${lib.optionalString (fetch != "") ''
+          ln -sv ${fetch} $dir/$(echo ${fetch.name} | sed 's|${version}|${dep.unresolved-version}|')
+        ''}
+      ''}
+    '') info.dependencies)}
+  '';
+
+  repo = runCommand "maven-repository" {} ''
+    bash ${script}
+  '';
+
+  settings = writeText "settings.xml" ''
+    <settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+      xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
+                          http://maven.apache.org/xsd/settings-1.0.0.xsd">
+      <localRepository>${repo}</localRepository>
+    </settings>
+  '';
+
+  src = dirOf infoFile;
+in {
+  inherit repo settings info;
+
+  build = stdenv.mkDerivation {
+    name = "${info.project.artifactId}-${info.project.version}.jar";
+
+    src = builtins.filterSource (path: type:
+      (toString path) != (toString (src + "/target")) &&
+        (toString path) != (toString (src + "/.git"))
+    ) src;
+
+    buildInputs = [ maven ];
+
+    buildPhase = "mvn --offline --settings ${settings} compile";
+
+    installPhase = ''
+      mvn --offline --settings ${settings} package
+      mv target/*.jar $out
+    '';
+  };
+}