Add an `llvm::OStream` workalike class for use with `Logger::cout()`, with the crucial difference being special handling of `llvm::Type`s so they get printed by name rather than printing their full representation (which can be positively *huge*). This allows re-enabling some logger calls that were disabled due to extreme verbosity.

#ifndef LDC_GEN_TOOBJ_H
#define LDC_GEN_TOOBJ_H

void writeModule(llvm::Module* m, std::string filename);

#endif