Implement Class.getDeclared(Constructors|Fields|Methods).

This required making sure that a Method* that represents a constructor
has java.lang.reflect.Constructor as its class.

Change-Id: I25908845a2b8d686d5404ac584693db0edd5853c
diff --git a/src/class_linker.h b/src/class_linker.h
index 083d641..09736ce 100644
--- a/src/class_linker.h
+++ b/src/class_linker.h
@@ -317,6 +317,7 @@
     kClassArrayClass,
     kObjectArrayClass,
     kJavaLangString,
+    kJavaLangReflectConstructor,
     kJavaLangReflectField,
     kJavaLangReflectMethod,
     kJavaLangClassLoader,