utils: Refactor the Wireshark plugin generator

This commit modifies the make_dissector.py script to parse the
MFSCommunication.h file without any pre-processing (it was done by sed
and awk), so that we will be able to implement some new features in the
python code.

Change-Id: I6bbd473bceac978277f90c89c97e4eaba32a483f