add getpid and prlimit to seccomp

This is needed to make sure seccomp work with glibc 2.27

BUG=chromium:897477
TEST=None

Change-Id: Ic3ecc9f1abebd8984974f8d2c7955b78b6ef0d25
Reviewed-on: https://chromium-review.googlesource.com/1298659
Commit-Ready: Yunlian Jiang <yunlian@chromium.org>
Tested-by: Yunlian Jiang <yunlian@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
4 files changed