Fixed puppet-check cron job output

Using exec doesn't flush stdout properly, use system instead.

puppet/files/puppet-check

@@ -41,8 +41,5 @@ end
 # restart
 printf("puppetd dead but pid file exists on host '%s', restarting\n",
        Socket.gethostname)
-begin
-    exec("service puppet start")
-rescue Errno::ENOENT
-    exec(puppetd)
-end
+system("service puppet start")
+system(puppetd) if $?.exitstatus == 127