Bug fix: annotating a type variable that has an annotated bound

[Werner Dietl]

Jon, all,

one of the final changes we had last week was to maintain
AnnotatedType through erasure.
This results in an exception when annotating a type variable that has
an annotated bound: it tries to add an annotation to something that is
already annotated - the erasure of the upper bound.

The fix is easy: the annotation on the type variable overrides an
annotation from the bound.
See:

http://hg.openjdk.java.net/type-annotations/type-annotations/langtools/rev/6ba99e86de7e

Please file a bug and push to TL at your convenience.

cu, WMD.

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