minor symfony#13645 fixed possible race condition when creating a directory (fabpot)

This PR was merged into the 2.3 branch.

Discussion
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fixed possible race condition when creating a directory

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | symfony#13228
| License       | MIT
| Doc PR        | n/a

Commits
-------

8542866 fixed possible race condition when creating a directory

Author: fabpot

src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php

@@ -666,7 +666,7 @@ private function registerAnnotationsConfiguration(array $config, ContainerBuilde
 
         if ('file' === $config['cache']) {
             $cacheDir = $container->getParameterBag()->resolveValue($config['file_cache_dir']);
-            if (!is_dir($cacheDir) && false === @mkdir($cacheDir, 0777, true)) {
+            if (!is_dir($cacheDir) && false === @mkdir($cacheDir, 0777, true) && !is_dir($cacheDir)) {
                 throw new \RuntimeException(sprintf('Could not create cache directory "%s".', $cacheDir));
             }
 

src/Symfony/Component/HttpFoundation/File/File.php

@@ -130,7 +130,7 @@ public function move($directory, $name = null)
     protected function getTargetFile($directory, $name = null)
     {
         if (!is_dir($directory)) {
-            if (false === @mkdir($directory, 0777, true)) {
+            if (false === @mkdir($directory, 0777, true) && !is_dir($directory)) {
                 throw new FileException(sprintf('Unable to create the "%s" directory', $directory));
             }
         } elseif (!is_writable($directory)) {

src/Symfony/Component/HttpKernel/Kernel.php

@@ -605,7 +605,7 @@ protected function buildContainer()
     {
         foreach (array('cache' => $this->getCacheDir(), 'logs' => $this->getLogDir()) as $name => $dir) {
             if (!is_dir($dir)) {
-                if (false === @mkdir($dir, 0777, true)) {
+                if (false === @mkdir($dir, 0777, true) && !is_dir($dir)) {
                     throw new \RuntimeException(sprintf("Unable to create the %s directory (%s)\n", $name, $dir));
                 }
             } elseif (!is_writable($dir)) {