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>

nixos/modules/services/cluster/hadoop/conf.nix

@@ -0,0 +1,44 @@
+{ cfg, pkgs, lib }:
+let
+  propertyXml = name: value: lib.optionalString (value != null) ''
+    <property>
+      <name>${name}</name>
+      <value>${builtins.toString value}</value>
+    </property>
+  '';
+  siteXml = fileName: properties: pkgs.writeTextDir fileName ''
+    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
+    <!-- generated by NixOS -->
+    <configuration>
+      ${builtins.concatStringsSep "\n" (pkgs.lib.mapAttrsToList propertyXml properties)}
+    </configuration>
+  '';
+  cfgLine = name: value: ''
+    ${name}=${builtins.toString value}
+  '';
+  cfgFile = fileName: properties: pkgs.writeTextDir fileName ''
+    # generated by NixOS
+    ${builtins.concatStringsSep "" (pkgs.lib.mapAttrsToList cfgLine properties)}
+  '';
+  userFunctions = ''
+    hadoop_verify_logdir() {
+      echo Skipping verification of log directory
+    }
+  '';
+  hadoopEnv = ''
+    export HADOOP_LOG_DIR=/tmp/hadoop/$USER
+  '';
+in
+pkgs.runCommand "hadoop-conf" {} (with cfg; ''
+  mkdir -p $out/
+  cp ${siteXml "core-site.xml" (coreSite // coreSiteInternal)}/* $out/
+  cp ${siteXml "hdfs-site.xml" (hdfsSiteDefault // hdfsSite // hdfsSiteInternal)}/* $out/
+  cp ${siteXml "mapred-site.xml" (mapredSiteDefault // mapredSite)}/* $out/
+  cp ${siteXml "yarn-site.xml" (yarnSiteDefault // yarnSite // yarnSiteInternal)}/* $out/
+  cp ${siteXml "httpfs-site.xml" httpfsSite}/* $out/
+  cp ${cfgFile "container-executor.cfg" containerExecutorCfg}/* $out/
+  cp ${pkgs.writeTextDir "hadoop-user-functions.sh" userFunctions}/* $out/
+  cp ${pkgs.writeTextDir "hadoop-env.sh" hadoopEnv}/* $out/
+  cp ${log4jProperties} $out/log4j.properties
+  ${lib.concatMapStringsSep "\n" (dir: "cp -r ${dir}/* $out/") extraConfDirs}
+'')