marsadm: preserve flushing order of filehandles

This ensures that warnings appear at the right place when one
does not use a redirection like 2>&1 at the commandline.

userspace/marsadm

@@ -44,12 +44,14 @@ sub llog {
 
 sub lprint {
   my ($text) = @_;
+  $OUTPUT_AUTOFLUSH = 1;
   print $text;
   llog($text);
 }
 
 sub lprint_stderr {
   my ($text) = @_;
+  $OUTPUT_AUTOFLUSH = 1;
   print STDERR $text;
   llog($text);
 }