[gnome-calendar] flatpak: add libdazzle

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 7470db159d426b0ce313ea1a76d46c15104a0e70
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Wed Nov 15 20:04:07 2017 -0200

    flatpak: add libdazzle

 org.gnome.Calendar.json |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)
---
diff --git a/org.gnome.Calendar.json b/org.gnome.Calendar.json
index 78107bb..e0e4492 100644
--- a/org.gnome.Calendar.json
+++ b/org.gnome.Calendar.json
@@ -87,6 +87,19 @@
             ]
         },
         {
+            "name": "libdazzle",
+            "config-opts": [ "--libdir=/app/lib",
+                             "--buildtype=debugoptimized" ],
+            "buildsystem": "meson",
+            "builddir": true,
+            "sources": [
+                {
+                    "type": "git",
+                    "url": "https://git.gnome.org/browse/libdazzle";
+                }
+            ]
+        },
+        {
             "name": "gnome-calendar",
             "sources": [
                 {