Add new target: vxworks for xscale

[Zack Weinberg]

Olivier Hainque <hainque@act-europe.fr> writes:

> Zack Weinberg wrote:
>> It might have appeared to work in a 3.2 source tree.
>
>  FWIW, it passes almost 100% of the chapter C tests in the ACAT 2.4 series,
>  on a real target. This includes, amongst others, hundreds of tests related to
>  Ada tasking and exceptions handling, often intermixed in very convoluted
>  ways.

As far as I know, the Ada runtime does not use the libgcc standard
threading or EH support routines; thus you would not have noticed that
this was broken from that test.

This is why all supported languages are supposed to be built and
tested.

zw