[LTP] [PATCH 3/3] epoll_pwait: Add test variants for epoll_pwait2 in epoll_pwait01

[Xie Ziyao]

Hi,

> Add test variants to switch between epoll_pwait and epoll_pwait2.
testcases/kernel/syscalls/epoll_pwait/epoll_pwait.h can also be deleted 
in this commit, which is a minor mistake.

> 
> Signed-off-by: Xie Ziyao <xieziyao@huawei.com>
> ---
>   .../syscalls/epoll_pwait/epoll_pwait01.c      | 234 ++++++------------
>   1 file changed, 80 insertions(+), 154 deletions(-)
Kind Regards,
Ziyao