merged branch pborreli/config-tweak (PR symfony#5521)

Commits ------- baf2c46 [Config] Little tweak Discussion ---------- [Config] Little tweak removed 2 useless call of dirname

Author: fabpot

src/Symfony/Component/Config/ConfigCache.php

@@ -99,7 +99,7 @@ public function write($content, array $metadata = null)
  throw new \RuntimeException(sprintf('Unable to write in the %s directory', $dir));
  }
 
- $tmpFile = tempnam(dirname($this->file), basename($this->file));
+ $tmpFile = tempnam($dir, basename($this->file));
  if (false !== @file_put_contents($tmpFile, $content) && @rename($tmpFile, $this->file)) {
  @chmod($this->file, 0666 & ~umask());
  } else {
@@ -108,7 +108,7 @@ public function write($content, array $metadata = null)
 
  if (null !== $metadata && true === $this->debug) {
  $file = $this->file.'.meta';
- $tmpFile = tempnam(dirname($file), basename($file));
+ $tmpFile = tempnam($dir, basename($file));
  if (false !== @file_put_contents($tmpFile, serialize($metadata)) && @rename($tmpFile, $file)) {
  @chmod($file, 0666 & ~umask());
  }