Added Filesystem Component mention in composer.json

- In the global Symfony2 composer.json file as a replacement
- In the FrameworkBundle composer.json file as a requirement

composer.json

@@ -43,6 +43,7 @@
         "symfony/dependency-injection": "self.version",
         "symfony/dom-crawler": "self.version",
         "symfony/event-dispatcher": "self.version",
+        "symfony/filesystem": "self.version",
         "symfony/finder": "self.version",
         "symfony/form": "self.version",
         "symfony/http-foundation": "self.version",

src/Symfony/Bundle/FrameworkBundle/composer.json

@@ -20,6 +20,7 @@
         "php": ">=5.3.2",
         "symfony/event-dispatcher": "self.version",
         "symfony/http-kernel": "self.version",
+        "symfony/filesystem": "self.version",
         "symfony/routing": "self.version",
         "symfony/templating": "self.version",
         "symfony/translator": "self.version",