[Validator] added missing ANNOTATION config to @Target annotation

src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntity.php

@@ -17,7 +17,7 @@ use Symfony\Component\Validator\Constraint;
  * Constraint for the Unique Entity validator
  *
  * @Annotation
- * @Target("CLASS")
+ * @Target({"CLASS", "ANNOTATION"})
  *
  * @author Benjamin Eberlei <kontakt@beberlei.de>
  */

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

@@ -15,7 +15,7 @@ use Symfony\Component\Validator\Constraint;
 
 /**
  * @Annotation
- * @Target("CLASS")
+ * @Target({"CLASS", "ANNOTATION"})
  *
  * @author Bernhard Schussek <bschussek@gmail.com>
  *

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

@@ -15,7 +15,7 @@ namespace Symfony\Component\Validator\Constraints;
  * Annotation for group sequences
  *
  * @Annotation
- * @Target("CLASS")
+ * @Target({"CLASS", "ANNOTATION"})
  *
  * @author Bernhard Schussek <bschussek@gmail.com>
  *

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

@@ -15,7 +15,7 @@ namespace Symfony\Component\Validator\Constraints;
  * Annotation to define a group sequence provider
  *
  * @Annotation
- * @Target("CLASS")
+ * @Target({"CLASS", "ANNOTATION"})
  */
 class GroupSequenceProvider
 {