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/compilers/openjdk/tests/hello.nix

@@ -0,0 +1,42 @@
+{ jdk
+, jre
+, pkgs
+}:
+
+/* 'Hello world' Java application derivation for use in tests */
+let
+  source = pkgs.writeTextDir "src/Hello.java" ''
+    class Hello {
+      public static void main(String[] args) {
+        System.out.println("Hello, world!");
+      }
+    }
+  '';
+in
+  pkgs.stdenv.mkDerivation {
+    pname = "hello";
+    version = "1.0.0";
+
+    src = source;
+
+    buildPhase = ''
+      runHook preBuildPhase
+      ${jdk}/bin/javac src/Hello.java
+      runHook postBuildPhase
+    '';
+    installPhase = ''
+      runHook preInstallPhase
+
+      mkdir -p $out/lib
+      cp src/Hello.class $out/lib
+
+      mkdir -p $out/bin
+      cat >$out/bin/hello <<EOF;
+      #!/usr/bin/env sh
+      ${jre}/bin/java -cp $out/lib Hello
+      EOF
+      chmod a+x $out/bin/hello
+
+      runHook postInstallPhase
+    '';
+  }