Hacky handling of type annotations.

Otherwise, the build fails with:

Compiling up to 4 files for COMPILE_CREATE_SYMBOLS
Creating ct.sym classes
Exception in thread "main" java.lang.IllegalStateException: Unhandled attribute: RuntimeVisibleTypeAnnotations
	at build.tools.symbolgenerator.CreateSymbols.readAttribute(CreateSymbols.java:2734)
	at build.tools.symbolgenerator.CreateSymbols.inspectClassFile(CreateSymbols.java:2292)
	at build.tools.symbolgenerator.CreateSymbols.loadFromDirectoryHandleClassFile(CreateSymbols.java:1719)
	at build.tools.symbolgenerator.CreateSymbols.loadVersionClassesFromDirectory(CreateSymbols.java:1680)
	at build.tools.symbolgenerator.CreateSymbols.createSymbols(CreateSymbols.java:254)
	at build.tools.symbolgenerator.CreateSymbols.main(CreateSymbols.java:4780)
gmake[3]: *** [Gendata.gmk:79: .../jdk/build/linux-x86_64-server-release/support/symbols/ct.sym] Error 1
gmake[2]: *** [make/Main.gmk:147: jdk.compiler-gendata] Error 2
gmake[2]: *** Waiting for unfinished jobs....

Author: wmdietl

make/langtools/src/classes/build/tools/symbolgenerator/CreateSymbols.java

@@ -2597,6 +2597,10 @@ private boolean readAttribute(ClassFile cf, FeatureDescription feature, Attribut
                 ((MethodDescription) feature).classParameterAnnotations =
                         parameterAnnotations2Description(cf.constant_pool, attr);
                 break;
+            case "RuntimeInvisibleTypeAnnotations":
+            case "RuntimeVisibleTypeAnnotations":
+                // TODO(wdietl): What should happen to type annotations?
+                break;
             case Attribute.Module: {
                 assert feature instanceof ModuleHeaderDescription;
                 ModuleHeaderDescription header =