[gnome-continuous] Switch cogl branch to 1.20

[Owen Taylor <otaylor src gnome org>]

commit a349ae0638d74fc8f81f407acdbbdf415e8a5603
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Mon Feb 23 16:24:57 2015 -0500

    Switch cogl branch to 1.20
    
    cogl-1.20 has been released and a new branch created; this is the same
    code that was in the 1.18 branch, so doesn't reflect a significant
    change.

 manifest.json |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/manifest.json b/manifest.json
index fc46d20..d73d1d1 100644
--- a/manifest.json
+++ b/manifest.json
@@ -637,7 +637,7 @@
                                 "--enable-xlib-egl-platform",
                                 "--enable-cogl-gst",
                                 "--enable-installed-tests"],
-                "branch": "cogl-1.18"},
+                "branch": "cogl-1.20"},
 
                {"src": "gnome:clutter",
                 "config-opts": ["--enable-installed-tests",