Update build.xml to reobfuscate with Searge names

Reobfuscating with Searge names (as opposed to the Obfuscated Minecraft classnames) will give the mod a pretty great chance of running on 1.6.4 even if compiled for 1.6.2, or any of the 1.6.x versions.
Merge branch 'patch-1' of https://github.com/TehSomeLuigi/EnderIO into TehSomeLuigi-patch-1