[fix #3825] Stub compilation requires all non-core-java classes to be stubbed.

src/stubs/com/sun/tools/javac/parser/Tokens.java

@@ -15,7 +15,7 @@ public class Tokens {
 		String getText();
 		
 		JCDiagnostic.DiagnosticPosition getPos();
-
+		
 		int getSourcePos(int index);
 		
 		CommentStyle getStyle();

src/stubs/com/sun/tools/javac/util/JCDiagnostic.java

@@ -0,0 +1,5 @@
+package com.sun.tools.javac.util;
+
+public class JCDiagnostic {
+	public interface DiagnosticPosition {}
+}