[LTP] [PATCH v2] syscalls/execveat01: new test to verify execveat unlinked fd

[Cyril Hrubis]

Hi!
Pushed with minor changes, thanks.

* Added check for execveat() support to the test setup and dropped the
  minimal kernel version from test structure

* Renamed the test to execveat03 so that we can add execveat01 and
  execveat02 that would test the cases without overlay being involved

* Removed SAFE_WAITPID() from the verify_execveat() since the child
  has to be waited for in the test library so that errors are propagated
  correctly

* Moved the execveat.h to the include/lapi/ directory

* Added syscalls/runtest entry so that the test is executed during the
  tesrun

-- 
Cyril Hrubis
chrubis@suse.cz