Exposing ObjC Class Structures from LLVM, per request by Rozbo

Note this Pass still uses Hikari's cleanup Infrastructure so you need that copy of LLVM

• Put ECS.h under include/llvm/Obfuscation/
• Put ECS.cpp under lib/Transforms/Obfuscation/
• Modify include/llvm/Obfuscation/Obfuscation.h to include the new header
• Modify lib/Transforms/Obfuscation/Obfuscation.cpp, at the beginning add:

FunctionPass* ECSPass=createECSPass();
    for (Module::iterator iter = M.begin(); iter != M.end(); iter++) {
      Function &F = *iter;
      ECSPass->runOnFunction(F);
    }
    delete ECSPass;

• Modify lib/Transforms/Obfuscation/CMakeLists.txtm add ECS.cpp right before DEPENDS