Rename separate logs to use sep_log prefix

tests/utils/gparmake.pp

@@ -41,7 +41,7 @@ procedure WriteChunkRule(rulenr: longint; const dirname, files: ansistring);
     write(#9'$(Q)$(DOTEST) $(DOTESTOPT) -Lchunk',rulestr,' -e ',files);
     if doredirect then
       begin
-        redirectfile:=dirname+DirectorySeparator+rulestr+'.log';
+        redirectfile:='$(TEST_OUTPUTDIR)/sep_log.chunk'+rulestr;
 	writeln(' > '+redirectfile);
       end
     else
@@ -188,7 +188,7 @@ Function ProcessArgs: longint;
 
 procedure WriteWrapperRules(totalchunks: longint);
   const
-    lognames: array[1..4] of string[11] = ('log','faillist','longlog','orderedlog');
+    lognames: array[1..4] of string[11] = ('log','faillist','longlog','sep_log');
   var
     logi,
     i: longint;