minor symfony#23907 [Validator] Add a property tag for File::$maxSize (issei-m)

This PR was merged into the 2.7 branch.

Discussion
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[Validator] Add a property tag for File::$maxSize

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | no
| New feature?  | no <!-- don't forget updating src/**/CHANGELOG.md files -->
| BC breaks?    | no
| Deprecations? | no <!-- don't forget updating UPGRADE-*.md files -->
| Tests pass?   | Not confirmed (because minor change)
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

For helping IDE to static analyze.

Commits
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b72ced2 [Validator] Add a property tag for File::$maxSize

Author: fabpot

src/Symfony/Component/Validator/Constraints/File.php

@@ -18,6 +18,8 @@
  * @Annotation
  * @Target({"PROPERTY", "METHOD", "ANNOTATION"})
  *
+ * @property int $maxSize
+ *
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
 class File extends Constraint