[PATCH] add spu fenv support

[Jeff Johnston]

Thanks Patrick.  Patch applied.

-- Jeff J.

Patrick Mansfield wrote:
> OK, updated patch to add spu fenv code,  third version, changes from last
> posting are:
> 
> - include all libm spu headers via #include "headers/file.h"
> 
> - move base fenv.h into ./newlib/libc/machine/spu/include/fenv.h
> 
> - add proper license to ./newlib/libc/machine/spu/sys/fenv.h
> 
> -- Patrick Mansfield