[gnome-continuous] Switch Babl to Meson

[Emmanuele Bassi <ebassi src gnome org>]

commit 771e373d4d21841b4a8b93f97abee164e3a99441
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Jul 29 23:03:28 2019 +0100

    Switch Babl to Meson
    
    The project dropped Autotools.

 manifest.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/manifest.json b/manifest.json
index c4089fa..47316fe 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1384,7 +1384,7 @@
 
                {"src": "gnome:babl.git",
                  "name": "babl",
-                 "force-autotools": true},
+                 "config-opts": ["-Dwith-docs=false"]},
 
                {"src": "zipfile:https://www.ece.uvic.ca/~frodo/jasper/software/jasper-1.900.1.zip";,
                 "name": "jasper",