RFA: USE_STRUCT_CONVENTION for NetBSD/i386

[Andrew Cagney]

"J.T. Conklin" wrote:

> I don't think NetBSD does anything non-standard other than defining
> DEFAULT_PCC_STRUCT_RETURN to 0 in its gcc config.  So this behavior
> should be shared among all x86 targets that do the same: cygwin,
> freebsd, linux-aout, and mach.

In that case, perhaps the function should live in i386-tdep.c (with a
new name).  Might as well share it :-)

	Andrew