Move semaphore.h to sysdeps/pthread/.

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 moves nptl/semaphore.h to sysdeps/pthread/semaphore.h so
that it can be found by builds from all glibc subdirectories; it's not
in any way NPTL-specific.  (I left the Makefile setting to install
this header in nptl/, but maybe it should move as well - it's just not
clear to me what ifeq ($(subdir),...) conditional should be used to
select the directory to associate the header with for installation
purposes.  The path in the toplevel Makefile used for begin-end-check
also remains hardcoded; it's a known todo issue to rework that test to
run in each subdirectory checking the headers installed from that
subdirectory, rather than a separate hardcoded list.)

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.

	* nptl/semaphore.h: Move to ...
	* sysdeps/pthread/semaphore.h: ... here.
	* Makefile (installed-headers): Change nptl/semaphore.h to
	sysdeps/pthread/semaphore.h.

1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 51ff5ca28e..b012cede8e 100644
--- a/Makefile
+++ b/Makefile
@@ -284,7 +284,7 @@ installed-headers = argp/argp.h assert/assert.h catgets/nl_types.h \
 		    malloc/obstack.h malloc/mcheck.h math/math.h \
 		    math/complex.h math/fenv.h math/tgmath.h misc/sys/uio.h \
 		    $(wildcard nis/rpcsvc/*.h) nptl_db/thread_db.h \
-		    sysdeps/nptl/pthread.h nptl/semaphore.h \
+		    sysdeps/nptl/pthread.h sysdeps/pthread/semaphore.h \
 		    nss/nss.h posix/sys/utsname.h posix/sys/times.h \
 		    posix/sys/wait.h posix/sys/types.h posix/unistd.h \
 		    posix/glob.h posix/regex.h posix/wordexp.h posix/fnmatch.h\