Bugfix for wrong number of beeps when changing profiles

When changing profiles with the sticks, CleanFlight was beeping 0 times for profile
1, once for profile 2, and twice for profile 3.  This wasn't intuitive, and was
different to how Baseflight beeps when changing profiles.
This change makes baseflight give the same number of beeps as the profile number
that you change into.
Merge pull request #29 from nebbian/feature-change-profile-beep-bugfix

Bugfix for wrong number of beeps when changing profiles