ReflectionAttribute: Link Attribute constants (fix #659)

Author: vrana

reference/reflection/reflectionattribute/gettarget.xml

@@ -16,8 +16,6 @@
    Gets target of the attribute as bitmask.
   </para>
 
-  &warn.undocumented.func;
-
  </refsect1>
 
  <refsect1 role="parameters">
@@ -28,8 +26,9 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   <!-- TODO: we should add target constant Attribute::TARGET_METHOD, and so on... -->
-   Gets target of the attribute as bitmask.
+   Gets target of the attribute as bitmask of
+   <link linkend="attribute.constants"><constant>Attribute::TARGET_*</constant>
+   constants.</link>.
   </para>
  </refsect1>