syscalls: syslog: Fix daemon restart on SUSE.

Some distributions (at least SUSE) names the service 'syslog' even if
the syslog binary is named syslog-ng or rsyslog.

This patch adds codepath that tries restart "syslog" service if previous
attempt has failed.

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>