Fixed DStress tests nocompile/c/{const_32_B.d,const_32_C.d}. Updated the runtest script to build libtangobos-partial.a if it hasn't already been built. Added in signbit() and va_arg!()() to libtangobos-partial.a so more of the phobos dependent DStress tests pass.

#ifndef __LDC_GEN_ABI_X86_64_H__
#define __LDC_GEN_ABI_X86_64_H__

#include "gen/abi.h"


TargetABI* getX86_64TargetABI();


#endif