merged branch jaugustin/fix-cache-clear-windows-2.0 (PR #4408)

Commits
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35b458f fix kernel root, linux dir separator on windows, to fix cache:clear issue

Discussion
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Fix cache clear windows 2.0

Hi,

This fix the issue #3453 for the 2.0 branch.

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by travisbot at 2012-05-25T07:43:47Z

This pull request [fails](http://travis-ci.org/symfony/symfony/builds/1430935) (merged 35b458f6 into f9044e44).

src/Symfony/Component/HttpKernel/Kernel.php

@@ -374,7 +374,7 @@ abstract class Kernel implements KernelInterface
     {
         if (null === $this->rootDir) {
             $r = new \ReflectionObject($this);
-            $this->rootDir = dirname($r->getFileName());
+            $this->rootDir = str_replace('\\', '/', dirname($r->getFileName()));
         }
 
         return $this->rootDir;