[folks] Bump vala required version.

[Jeremy Whiting <jpwhiting src gnome org>]

commit ce26b3e83dc8154de6e911ac29f585e610f59eac
Author: Jeremy Whiting <jpwhiting kde org>
Date:   Wed Sep 5 18:01:03 2012 -0600

    Bump vala required version.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4216457..f1d2ad5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -159,7 +159,7 @@ AM_CONDITIONAL([ENABLE_LIBSOCIALWEB],
 # -----------------------------------------------------------
 
 GLIB_REQUIRED=2.32.0
-VALA_REQUIRED=0.15.2
+VALA_REQUIRED=0.17.6
 VALADOC_REQUIRED=0.3.1
 TRACKER_SPARQL_MAJOR=0.14
 TRACKER_SPARQL_REQUIRED=0.13.1