[jhbuild] Add warning about modifying core apps list

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 20589b38e51fd50efe69c9bdaf2e285a3de8da23
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Sun Aug 27 22:00:49 2017 -0500

    Add warning about modifying core apps list
    
    Changes to core apps require wider review than we've used in the past.

 modulesets/gnome-suites-core-3.26.modules |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/modulesets/gnome-suites-core-3.26.modules b/modulesets/gnome-suites-core-3.26.modules
index 44327f1..798ef69 100644
--- a/modulesets/gnome-suites-core-3.26.modules
+++ b/modulesets/gnome-suites-core-3.26.modules
@@ -1291,7 +1291,9 @@
 <!-- Meta Modules -->
 
   <!-- The Core GNOME Utilities: Only unbranded, GNOME integrated
-       basic functionality utilities allowed
+       basic functionality utilities allowed.
+
+       Before modifying this list, mail release-team@ and CC Allan.
   -->
   <metamodule id="meta-gnome-core-utilities">
     <dependencies>