[folks] Make sure Tracker tests actually use the Tracker backend for writes.

[Travis Reitter <treitter src gnome org>]

commit 274b4c097080f21b56b8446664578627d78bf7f9
Author: Travis Reitter <travis reitter collabora co uk>
Date:   Fri Aug 26 10:31:36 2011 -0700

    Make sure Tracker tests actually use the Tracker backend for writes.

 tests/tracker/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/tests/tracker/Makefile.am b/tests/tracker/Makefile.am
index b3e1267..3de8b94 100644
--- a/tests/tracker/Makefile.am
+++ b/tests/tracker/Makefile.am
@@ -111,6 +111,7 @@ TESTS_ENVIRONMENT = \
 	GCONF_DEFAULT_SOURCE_PATH= abs_top_srcdir@/tests/data/gconf.path \
 	FOLKS_BACKEND_PATH=$(BACKEND_UNINST_PATH) \
 	FOLKS_BACKEND_STORE_KEY_FILE_PATH=$(backend_store_key_file) \
+	FOLKS_WRITEABLE_STORE=tracker \
 	AVATAR_FILE_PATH=$(avatar_file) \
 	$(RUN_WITH_PRIVATE_BUS) \
 	--session \