Add a warning suppression for getClass() on an annotation.

Change-Id: Iff1e08667db642462da450d37563f4b484d13456

user/test/com/google/gwt/dev/jjs/test/AnnotationsTest.java

diff --git a/user/test/com/google/gwt/dev/jjs/test/AnnotationsTest.java b/user/test/com/google/gwt/dev/jjs/test/AnnotationsTest.java
index 367478b..af856a4 100644
--- a/user/test/com/google/gwt/dev/jjs/test/AnnotationsTest.java
+++ b/user/test/com/google/gwt/dev/jjs/test/AnnotationsTest.java
@@ -58,6 +58,7 @@
     return "com.google.gwt.dev.jjs.CompilerSuite";
   }
 
+  @SuppressWarnings("GetClassOnAnnotation")
   public void testAnnotationImplementor() {
     Foo f = new Foo();
     assertEquals(Foo.class, f.getClass());