Fix mysql-test-run on windows:

- Make it not to add '--console' when '--log-error' option is present

mysql-test/mysql-test-run.pl

@@ -4433,8 +4433,10 @@ sub mysqld_start ($$) {
   if (IS_WINDOWS)
   {
     # Trick the server to send output to stderr, with --console
+    if (!(join(' ', @$args) =~ /--log-error/)) {
       mtr_add_arg($args, "--console");
     }
+  }
 
   if ( $opt_gdb || $opt_manual_gdb )
   {
@@ -5056,9 +5058,11 @@ sub start_mysqltest ($) {
     if (IS_WINDOWS)
     {
       # Trick the server to send output to stderr, with --console
+      if (!(join(' ', @$args) =~ /--log-error/)) {
         mtr_add_arg($args, "--server-arg=--console");
       }
     }
+  }
 
   foreach my $arg ( @opt_extra_mysqltest_opt )
   {