[jhbuild] core-3.26: use the gnome-3-26 branch of mutter

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 594f12af016365158f1002768be3e7876a3c27ed
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Oct 8 22:21:03 2017 +0300

    core-3.26: use the gnome-3-26 branch of mutter

 modulesets/gnome-suites-core-3.26.modules |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/modulesets/gnome-suites-core-3.26.modules b/modulesets/gnome-suites-core-3.26.modules
index 4d6df19..ac22b17 100644
--- a/modulesets/gnome-suites-core-3.26.modules
+++ b/modulesets/gnome-suites-core-3.26.modules
@@ -482,7 +482,7 @@
     <if condition-unset="wayland">
       <autogenargs value="--disable-wayland-egl-server"/>
     </if>
-    <branch/>
+    <branch revision="gnome-3-26"/>
     <dependencies>
       <dep package="cairo"/>
       <dep package="egl"/>