init.d/ scripts may not be available on distros
using systemd, for example Fedora16.

This patch is using 'systemctl' to restart syslog daemon
on distros running systemd. If systemctl is not available
it falls back to directly calling init script.

Also it drops few upstart TODO comments, current code
works OK with upstart (tested on RHEL6).

Signed-off-by: Jan Stancek <jstancek@redhat.com>
---
  testcases/kernel/syscalls/syslog/syslog-lib.sh |   40 
+++++++++++++----------
  1 files changed, 23 insertions(+), 17 deletions(-)