[folks] core: Clarify that Persona.linkable_properties doesn't change at runtime

[Raul Gutierrez Segales <raulgs src gnome org>]

commit 6ed7d51617cc9b2aa141497d7437c8b7247cbf40
Author: Philip Withnall <philip tecnocode co uk>
Date:   Tue Sep 6 22:04:20 2011 +0100

    core: Clarify that Persona.linkable_properties doesn't change at runtime
    
    Helps: bgo#656689

 folks/persona.vala |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/folks/persona.vala b/folks/persona.vala
index 47a4315..dcf1a21 100644
--- a/folks/persona.vala
+++ b/folks/persona.vala
@@ -179,6 +179,9 @@ public abstract class Folks.Persona : Object
    * This list will have no effect if the Persona's { link PersonaStore} trust
    * level is not { link PersonaStoreTrust.FULL}.
    *
+   * This property value is guaranteed to be constant for a given persona,
+   * but may vary between personas in the same store.
+   *
    * @since 0.1.13
    */
   public abstract string[] linkable_properties { get; }