[folks] Fix link-personas-diff-stores test. Need to use both test and other addressbooks.

[Jeremy Whiting <jpwhiting src gnome org>]

commit b0c51f90db62b8390d55ab098963792627fc29c4
Author: Jeremy Whiting <jpwhiting kde org>
Date:   Mon Jun 25 13:01:49 2012 -0600

    Fix link-personas-diff-stores test.
    Need to use both test and other addressbooks.

 tests/eds/link-personas-diff-stores.vala |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/tests/eds/link-personas-diff-stores.vala b/tests/eds/link-personas-diff-stores.vala
index bfbecdf..202795b 100644
--- a/tests/eds/link-personas-diff-stores.vala
+++ b/tests/eds/link-personas-diff-stores.vala
@@ -54,6 +54,8 @@ public class LinkPersonasDiffStoresTests : Folks.TestCase
       /* We configure eds as the primary store */
       var config_val = "eds:%s".printf (this._eds_backend.address_book_uid);
       Environment.set_variable ("FOLKS_PRIMARY_STORE", config_val, true);
+      Environment.set_variable ("FOLKS_BACKEND_EDS_USE_ADDRESS_BOOKS",
+                                "test:other", true);
     }
 
   public override void tear_down ()