Configure: make it work with Perl 5.10.

Reviewed-by: NRichard Levitte <levitte@openssl.org>

Configure

@@ -1036,7 +1036,7 @@ if ($disabled{"dynamic-engine"}) {
 }
 
 unless ($disabled{fuzz}) {
-    push $config{dirs}, "fuzz";
+    push @{$config{dirs}}, "fuzz";
     $config{cflags} .= "-fsanitize-coverage=edge,indirect-calls ";
 }