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 bug11;

struct S
{
    int[4] arr;
}

S s=S([1,2,3,4]);

void main()
{
}