Resolve static enum members from compiled Java

For static members, a corresponding package is now created for every enum, as
it's done for every other class. All static members of enum classes are
resolved into the package, EXCEPT its enum entries, valueOf() and values()
methods, which are put into the enum's class descriptor.

compiler/testData/loadJava/compiledJava/annotations/CustomAnnotation.txt

@@ -24,6 +24,3 @@ public trait CustomAnnotation : java.lang.Object {
         public constructor MyTest()
     }
 }
-
-package CustomAnnotation {
-}