message: Fix missing Symbol version aux
diff: @@ -151,6 +151,16 @@ Symbol Version
  ----------
  +Symbol Version Auxiliary
  +************************
  +
  +.. autoclass:: lief.ELF.SymbolVersionAux
  + :members:
  + :inherited-members:
  + :undoc-members:
  +
  +----------
  +
  Symbol Version Definition
  *************************
  