Bug #27099: system_mysql fail in pushbuild windows

On Windows the debug log was doing freopen () instead of
fflush() and that was slowing the logging down that much 
that some tests timed out.
Fixed by replacing the freopen() with an syncing-to-disk
flag to fopen() and fflush().
Also increased the timeout of the tests running with --debug
on windows : seems to slow down as much as valgrind on linux.

dbug/dbug.c

@@ -1826,7 +1826,13 @@ static void DBUGOpenFile(CODE_STATE *cs,
       else
       {
         newfile= !EXISTS(name);
-        if (!(fp= fopen(name, append ? "a+" : "w")))
+        if (!(fp= fopen(name,
+#if defined(MSDOS) || defined(__WIN__)
+		append ? "a+c" : "wc"
+#else
+                append ? "a+" : "w"
+#endif
+		)))
         {
           (void) fprintf(stderr, ERR_OPEN, cs->process, name);
           perror("");
@@ -2229,26 +2235,12 @@ static void dbug_flush(CODE_STATE *cs)
 {
 #ifndef THREAD
   if (cs->stack->flags & FLUSH_ON_WRITE)
-#endif
-  {
-#if defined(MSDOS) || defined(__WIN__)
-    if (cs->stack->out_file != stdout && cs->stack->out_file != stderr)
-    {
-      if (!(freopen(cs->stack->name,"a",cs->stack->out_file)))
-      {
-        (void) fprintf(stderr, ERR_OPEN, cs->process, cs->stack->name);
-        fflush(stderr);
-        cs->stack->out_file= stderr;
-      }
-    }
-    else
 #endif
   {
     (void) fflush(cs->stack->out_file);
     if (cs->stack->delay)
       (void) Delay(cs->stack->delay);
   }
-  }
   if (!cs->locked)
     pthread_mutex_unlock(&THR_LOCK_dbug);
 } /* dbug_flush */

mysql-test/mysql-test-run.pl

@@ -1019,12 +1019,14 @@ sub command_line_setup () {
   {
     $opt_testcase_timeout= $default_testcase_timeout;
     $opt_testcase_timeout*= 10 if $opt_valgrind;
+    $opt_testcase_timeout*= 10 if ($opt_debug and $glob_win32);
   }
 
   if ( ! $opt_suite_timeout )
   {
     $opt_suite_timeout= $default_suite_timeout;
     $opt_suite_timeout*= 6 if $opt_valgrind;
+    $opt_suite_timeout*= 6 if ($opt_debug and $glob_win32);
   }
 
   if ( ! $opt_user )