ptop and top file now stored in project directory.

tbsetup/tbprerun.in

@@ -46,7 +46,7 @@ else {
 $prefix = &tbs_prefix($nsfile);
 $irfile = "$prefix.ir";
 $logfile = "$prefix.log";
-$ptopfile = "/tmp/testbed$$.ptop";
+$ptopfile = "testbed$$.ptop";
 $id = "$pid-$eid";
 
 $tbcmdfile = "tbcmds";