[gnome-robots/arnaudb/modernize-code] Fix CI.

[Arnaud B. <arnaudb src gnome org>]

commit 35700e9b0f12b03d446faca4b2e363bdf5262697
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Mon May 25 17:35:06 2020 +0200

    Fix CI.
    
    Per discussion on !8.

 build-aux/org.gnome.Robots.json | 13 +++++++++++++
 1 file changed, 13 insertions(+)
---
diff --git a/build-aux/org.gnome.Robots.json b/build-aux/org.gnome.Robots.json
index e3de457..84ffe08 100644
--- a/build-aux/org.gnome.Robots.json
+++ b/build-aux/org.gnome.Robots.json
@@ -50,6 +50,19 @@
             "sources" : [{
                 "type" : "git",
                 "url" : "https://gitlab.gnome.org/GNOME/gsound.git";
+            }],
+            "modules": [{
+                    "name": "libcanberra",
+                    "config-opts": [
+                        "--disable-alsa",
+                        "--disable-null",
+                        "--disable-oss"
+                    ],
+                    "sources": [{
+                        "type": "archive",
+                        "url": "http://0pointer.de/lennart/projects/libcanberra/libcanberra-0.30.tar.xz";,
+                        "sha256": "c2b671e67e0c288a69fc33dc1b6f1b534d07882c2aceed37004bf48c601afa72"
+                    }]
             }]
         },
         {