[gnome-ostree] manifest: Enable gtk3 installed tests

[Colin Walters <walters src gnome org>]

commit d4aacd091adc1c172e2557be9e314e586c0ab67b
Author: Colin Walters <walters verbum org>
Date:   Thu May 9 13:26:54 2013 -0400

    manifest: Enable gtk3 installed tests

 manifest.json |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/manifest.json b/manifest.json
index 830a31e..f9ce094 100644
--- a/manifest.json
+++ b/manifest.json
@@ -505,6 +505,7 @@
                 "branch": "gtk-engines-2-22"},
 
                {"src": "gnome:gtk+",
+                "config-opts": ["--enable-installed-tests"],
                 "name": "gtk3"},
 
                {"src": "fd:plymouth",