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 bug38;

void func(int* p)
{
    p++;
}

void main()
{
    int i;
    func(&i);
}