[IMPR] Add current directory for similar script search
[IMPR] Add current directory for similar script search

This enables similar script search for
generate_user_files.py and generate_family_file.py
(and btw for pwb.py for test purpose probably)

Bug: T217195
Change-Id: I808e870307c181e5bb59e18af136e71ee990daf9

wikimedia/pywikibot-core,wikimedia/pywikibot-core,PersianWikipedia/pywikibot-core