Fix error at compilation after adding a new ionic model
This MR fixes a bug at compilation when adding a New Ionic model as described here
An issue was raised in Q&A about this: https://opencarp.org/q2a/575/compiling-from-source-with-own-model
In practice, it makes the generation of generated_functions.cc
depend on the creation of *.h and *.cc files for ionic models so that these files exist before the generation of generated_functions.cc
is run.