add fpurge

[Eric Blake]

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According to Corinna Vinschen on 6/28/2009 5:51 AM:
>> 	Add fpurge.
>> 	* stdio/fpurge.c (fpurge, _fpurge_r): New file.
>> 	* libc/stdio/Makefile.am (ELIX_4_SOURCES, CHEWOUT_FILES, fpurge):
>> 	Build it.
>> 	* libc/stdio/Makefile.in: Regenerated.
>> 	* libc/include/stdio.h (fpurge, _fpurge_r): New declarations.
> 
> Since you also created the documentation, isn't the small patch to
> libc/stdio/stdio.tex missing?

Thanks; I've updated that in my local copy, while we wait for approval.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             ebb9@byu.net
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