[Bug 738531] bootstrap: Install flex on OS X

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=738531
  GStreamer | cerbero | git

--- Comment #4 from Sebastian Dröge (slomo) <slomo at coaxion.net> 2014-10-14 14:20:16 UTC ---
Yes, alternatively we could also just build them ourselves on all platforms
instead of using the distro versions on Linux. Like we do for other build tools
already

-- 
Configure bugmail: https://bugzilla.gnome.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug.
You are the assignee for the bug.