[LTP] [PATCH v3] getdents: update to the new api, don't mix libc and kernel types

[Cyril Hrubis]

Hi!
Pushed with a minor changes, thanks.

* Removed the GPL license text since it's replaced by the SPDX identifier

* Formatted the test description into asciidoc and changed the comment
  so that it's picked up by documentation parser

* Checked explictily for -1 return value in negative test

* Made use of TERROR flags instead of usings strerror() to print errnos

-- 
Cyril Hrubis
chrubis@suse.cz