Add a dependencies manifest entry so that Objenesis can access
jdk.unsupported when deployed in WildFly.

Objenesis needs access to sun.reflect.ReflectionFactory located in the jdk.unsupported module. WildFly by default restricts applications from accessing the jdk.unsupported module (WFCORE-4055).

To give Objenesis access to the jdk.unsupported module users need to do either of the following:

• Add a Dependencies manifest entry to the application or module itself
• Use jboss-deployment-structure.xml

Adding the Dependencies manifest header to Objenesis itself making things "just work"(tm) for Objenesis users on WildFly.