[LTP] [PATCH v3] syscalls/pipe13: Add regression test for pipe to wake up all readers

[Cyril Hrubis]

Hi!
I've added a few more fixes/assertions and pushed, thanks.

* Changed the code to run the test for a few different number of
  children

* Added check for return value from the read() in the child

* Added SAFE_CLOSE(fds[0]) into the parent
  - this fixes failures with large enough -i parameter where the test
    would run out of file descriptors

-- 
Cyril Hrubis
chrubis@suse.cz