Implemented handling of GwtIncompatible annotations.

Any class, method or field that has an annotation named GwtIncompatible
is ignored by the compiler.

Fixes issue 3769.

Change-Id: I0f995d107b9e24fb7afb8aca95ab99b35f561216
Review-Link: https://gwt-review.googlesource.com/#/c/2320/

Review by: skybrian@google.com

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@11570 8db76d5a-ed1c-0410-87a9-c151d255dfc7
6 files changed