fcntl/fcntl31.c: add I/O availability signals test for fcntl(2)

create a new case to test F_GETOWN, F_SETOWN, F_GETOWN_EX,
F_SETOWN_EX, F_GETSIG, F_SETSIG for fcntl(2)

Signed-off-by: Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com>
diff --git a/configure.ac b/configure.ac
index 0004a55..43a5a16 100644
--- a/configure.ac
+++ b/configure.ac
@@ -173,5 +173,6 @@
 LTP_CHECK_MKDIRAT
 LTP_CHECK_FCHOWNAT
 LTP_CHECK_FALLOCATE
+LTP_CHECK_SYSCALL_FCNTL
 
 AC_OUTPUT