Don't print the entire declaration of the alliassee when `->toChars()` is called on an `AliasDeclaration`; just printing the name will do. This fixes #305, which otherwise tries to generate {{{ class E { void A() { alias /* recurse into E->toCBuffer() */ m; } } }}} by way of an infinite recursion (causing a segfault when the stack runs out).

#ifndef LDC_PASSES_H
#define LDC_PASSES_H

#include "gen/metadata.h"
namespace llvm {
    class FunctionPass;
    class ModulePass;
}

// Performs simplifications on runtime calls.
llvm::FunctionPass* createSimplifyDRuntimeCalls();

#ifdef USE_METADATA
llvm::FunctionPass* createGarbageCollect2Stack();
llvm::ModulePass *createStripMetaData();
#endif


#endif