Force initialize the runtime module in Module::genLLVMModule. It is required for all non-trivial D modules anyway, so why load it lazily? This fixes run/typeid_83.d (DtoDeclareTypeInfo expects runtime to be initialized)

module bug48;

size_t func(void *p)
{
    return cast(size_t)*cast(void* *)p;
}

void main()
{
}