bug #4300 [Components][PropertyAccess] Fix PropertyAccessorBuilder usage (Thierry Geindre)

This PR was merged into the 2.3 branch.

Discussion
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[Components][PropertyAccess] Fix PropertyAccessorBuilder usage

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.3, 2.4, 2.5
| Fixed tickets |

See https://github.com/symfony/PropertyAccess/blob/2.3/PropertyAccess.php

`getPropertyAccessorBuilder` does not exist. But the right fix might be to add the missing method.

Commits
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c0167da Fix PropertyAccessorBuilder usage

Author: wouterj

components/property_access/introduction.rst

@@ -209,7 +209,7 @@ enable this feature by using :class:`Symfony\\Component\\PropertyAccess\\Propert
     $person = new Person();
 
     // Enable magic __call
-    $accessor = PropertyAccess::getPropertyAccessorBuilder()
+    $accessor = PropertyAccess::createPropertyAccessorBuilder()
         ->enableMagicCall()
         ->getPropertyAccessor();
 
@@ -305,7 +305,7 @@ see `Enable other Features`_.
     $person = new Person();
 
     // Enable magic __call
-    $accessor = PropertyAccess::getPropertyAccessorBuilder()
+    $accessor = PropertyAccess::createPropertyAccessorBuilder()
         ->enableMagicCall()
         ->getPropertyAccessor();