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>
7 files changed