add options file for astyle

(cherry picked from commit dbbacaa9c7b7efb00ea9573e12dd189da3075fe6)

Conflicts:
	HACKING

Change-Id: Ifa12207d6d3bde25af615b293ca1f18c839a3a2f
Allow equal identing of functions

(cherry picked from commit f48d89167a57971fed2bbf55fecf06626ce8772d)