syscalls/epoll_*: allow for epoll_wait returning a subset of events

The epoll_wait syscall is not guaranteed to return all pending events -
a subset may be returned. Modify the epoll_wait01 and epoll_ctl01
testcases to allow for that.

CC: Greg KH <gregkh@linuxfoundation.org>
Signed-off-by: Steve Muckle <smuckle.linux@gmail.com>
Reviewed-by: Cyril Hrubis <chrubis@suse.cz>
Bug: 63588371
Test: run vts-kernel -m VtsKernelLtp
Change-Id: I945c6e213323bc8ffad104d9168e3c17bfff4745
2 files changed