[grilo] build: Require vala 0.27

[Bastien Nocera <hadess src gnome org>]

commit f48941d8e38cace3f709c78a2609c30d2693d998
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Jan 21 23:36:11 2015 +0100

    build: Require vala 0.27
    
    The current git master version, as grilo refuses to build with
    anything older. We'll switch to 0.28 when it's out.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 98c327f..11828a1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -258,7 +258,7 @@ GOBJECT_INTROSPECTION_CHECK([0.9])
 # VALA BINDINGS
 # ----------------------------------------------------------
 
-VAPIGEN_CHECK([0.26])
+VAPIGEN_CHECK([0.27])
 
 # ----------------------------------------------------------
 # GETTEXT/INTLTOOL