[gnome-continuous] Pin libical to v3.0.5

[Emmanuele Bassi <ebassi src gnome org>]

commit f7f6447b24c3e67eb41207740d4775e6e0f6b40e
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Fri Aug 2 18:50:46 2019 +0100

    Pin libical to v3.0.5

 manifest.json | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/manifest.json b/manifest.json
index 570a02a..e9058ab 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1086,6 +1086,8 @@
 
                {"src": "libical:libical.git",
                  "branch": "3.0",
+                 "tag": "1b3eb45a7db4a9fd0aaf70fc7f8cfa9a4800ece4",
+                 "tag-reason": "https://github.com/libical/libical/issues/406";,
                 "patches": ["libical-cmake-buildapi.patch"]},
 
                {"src": "gnome:evolution-data-server.git",