Building gas/ld to default to old-school A.OUT format

[David D. Hagood]

I am trying to generate binutil binaries to work with VxWorks - as such I need 
to generate old-style a.out (0407) binaries.

I cannot figure out how to configure things to get this - I always get binaries 
that build for the Linux a.out format, rather than the format VxDoesntWork expects.