Patch to add BeOS/x86 support

[N8TM@aol.com]

In a message dated 1/12/2000 3:51:03 AM Pacific Standard Time, 
aph@pasanda.cygnus.co.uk writes:

> the rest of the world considers the default
>  name "a.out" to be a charming eccentricity from UNIX's ancient
>  history.  In my opinion this just makes us look silly.
>  
>  I suppose that there is a downside to changing the default name, in
>  that it may break existing makefiles.  However, most properly
>  constructed makefiles explicitly set the name of the executable.

There's a spot in the standard testsuite, the first time it tries to run 
u77-test, where it is broken because the executable is assumed to be ./a.out  
regardless of the fact that we already have targets where this is not so.