Load modules based on new MESA build system

[rjfarmer]

Works on MESAHub/mesa#908 though also needs likely needs MESAHub/mesa#905

Any module that depends on utils wont load with an error:

OSError: libutils.so: cannot enable executable stack as shared object requires: Invalid argument

which is most modules. But at least const loads so we can very accurately know what 2/3 is:

const_def.two_thirds
np.float64(0.6666666666666666)