Export subclasses stubs to be compiled by Flex too.

WIP: merging ABCs
Test data (flexedit) with simple class hierarchy

libsrc/ffdec_lib/testdata/flexedit/pkg/ParentClass.as

@@ -0,0 +1,11 @@
+package pkg {
+	
+	public class ParentClass extends ParentParentClass {				
+
+		public function ParentClass() {
+			// constructor code
+		}
+
+	}
+	
+}