conditional cancellation-point test of usleep

usleep is a SUSv3 function

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

test/pthread/cancellation-points.c

@@ -149,7 +149,9 @@ MAKE_CANCEL_THREAD_FUNC(sigwaitinfo, (NULL, NULL))
 MAKE_CANCEL_THREAD_FUNC(sleep, (0))
 MAKE_CANCEL_THREAD_FUNC(system, (""))
 MAKE_CANCEL_THREAD_FUNC(tcdrain, (-1))
+#ifdef __UCLIBC_SUSV3_LEGACY__
 MAKE_CANCEL_THREAD_FUNC(usleep, (0))
+#endif
 MAKE_CANCEL_THREAD_FUNC(wait, (NULL))
 MAKE_CANCEL_THREAD_FUNC(waitid, (0, 0, NULL, 0))
 MAKE_CANCEL_THREAD_FUNC(waitpid, (-1, NULL, 0))
@@ -264,7 +266,9 @@ int main(int argc, char *argv[])
 	ret += TEST_FUNC(sleep);
 	ret += TEST_FUNC(system);
 	ret += TEST_FUNC(tcdrain);
+#ifdef __UCLIBC_SUSV3_LEGACY__
 	ret += TEST_FUNC(usleep);
+#endif
 	ret += TEST_FUNC(wait);
 	ret += TEST_FUNC(waitid);
 	ret += TEST_FUNC(waitpid);