[jhbuild] 3.28: Switch to vala 0.40 branch

[Rico Tzschichholz <ricotz src gnome org>]

commit ad3c503b916a3c38f9cc67bd738e97d74179faa1
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Mar 21 14:19:02 2018 +0100

    3.28: Switch to vala 0.40 branch

 modulesets/gnome-suites-core-deps-3.28.modules |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/modulesets/gnome-suites-core-deps-3.28.modules b/modulesets/gnome-suites-core-deps-3.28.modules
index 660e67a..5721425 100644
--- a/modulesets/gnome-suites-core-deps-3.28.modules
+++ b/modulesets/gnome-suites-core-deps-3.28.modules
@@ -1889,7 +1889,8 @@ the module and we will just change it to use a tarball anyway.
   </autotools>
 
   <autotools id="vala" supports-non-srcdir-builds="no">
-    <branch />
+    <pkg-config>libvala-0.40.pc</pkg-config>
+    <branch revision="0.40"/>
     <dependencies>
       <dep package="bison"/>
       <dep package="flex"/>