Jigsaw restricts setAccessible across module boundaries.

We are seeing the following stack trace.

     [java] [carbgen] java.lang.reflect.InaccessibleObjectException: Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @3b5fad2d
     [java] [carbgen] at java.base/jdk.internal.reflect.Reflection.throwInaccessibleObjectException(Reflection.java:424)
     [java] [carbgen] at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:198)
     [java] [carbgen] at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:192)
     [java] [carbgen] at java.base/java.lang.reflect.Method.setAccessible(Method.java:186)
     [java] [carbgen] at com.sun.xml.bind.v2.runtime.reflect.opt.Injector.getMethod(Injector.java:184)

This is the standalone version (the JDK version is in a different package). This is solved for the JDK version but it's not in the standalone version yet.