Add more headers to include/ for conform tests

[Carlos O'Donell]

On 11/27/2014 03:42 PM, Joseph Myers wrote:
> Carlos reported failures in conform/ tests in environments where the
> compiler used could only find headers in glibc's source and build
> trees, not any previously installed headers
> <https://sourceware.org/ml/libc-alpha/2014-09/msg00040.html>.
> 
> This patch adds wrappers for the affected headers to include/, which
> is the normal way to make headers visible when building or testing in
> directories other than the one containing the header (I suppose these
> headers weren't needed in any such directories except conform/, or
> other build or test failures would have resulted).  I believe the same
> issue applies at least to regexp.h and re_comp.h - we don't currently
> have conform/ expectations for those, but when such expectations are
> added we'll also need to add header wrappers.
> 
> The semaphore.h wrapper just includes nptl/semaphore.h - there's a
> question about whether this is logically correct, given the
> possibility of other thread library implementations.  I suggested a
> couple of possible alternative approaches in
> <https://sourceware.org/ml/libc-alpha/2014-09/msg00046.html>.
> 
> Tested for x86_64 (testsuite, and that installed stripped shared
> libraries are unchanged by the patch).  I did *not* test a
> configuration such as that in which Carlos saw failure.
> 
> 2014-11-27  Joseph Myers  <joseph@codesourcery.com>
> 
> 	* include/cpio.h: New file.
> 	* include/fmtmsg.h: Likewise.
> 	* include/semaphore.h: Likewise.

This fixes the failures I see on Fedora 20.

Now I have only 200+ linknamespace failures :-)

Cheers,
Carlos.