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 sqrts;

import tango.stdc.math;

double sqrt(double d)
{
    return tango.stdc.math.sqrt(d);
}

void main()
{
}