[Console] improve regex performance to validate name

using possesive quantifier

Author: Tobion

src/Symfony/Component/Console/Command/Command.php

@@ -615,7 +615,7 @@ public function asXml($asDom = false)
  */
  private function validateName($name)
  {
- if (!preg_match('/^[^\:]+(\:[^\:]+)*$/', $name)) {
+ if (!preg_match('/^[^\:]++(\:[^\:]++)*$/', $name)) {
  throw new \InvalidArgumentException(sprintf('Command name "%s" is invalid.', $name));
  }
  }