Add the following additional Getrlimit/Setrlimit resource constants (see
http://man7.org/linux/man-pages/man2/getrlimit.2.html):

  RLIMIT_LOCKS
  RLIMIT_MEMLOCK
  RLIMIT_MSGQUEUE
  RLIMIT_NICE
  RLIMIT_NPROC
  RLIMIT_RSS
  RLIMIT_RTPRIO
  RLIMIT_RTTIME
  RLIMIT_SIGPENDING

Fixes golang/go#14854

Change-Id: I302ff67d6d1b11d94f18614490fbd634a8caec19
Reviewed-on: https://go-review.googlesource.com/45052Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>