[libadwaita] doap: Add Christopher Davis

[Christopher Davis <christopherdavis src gnome org>]

commit 440bae67e0d62a8e828c7dd7e334673256b89ce3
Author: Christopher Davis <christopherdavis gnome org>
Date:   Tue Jun 22 16:27:49 2021 -0700

    doap: Add Christopher Davis
    
    I was a maintainer on the repo prior to it being moved
    into the /GNOME/ namespace.

 libadwaita.doap | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/libadwaita.doap b/libadwaita.doap
index 6ef4e33c..523980ce 100644
--- a/libadwaita.doap
+++ b/libadwaita.doap
@@ -32,6 +32,13 @@
       <gnome:userid>alexm</gnome:userid>
     </foaf:Person>
   </maintainer>
+  <maintainer>
+    <foaf:Person>
+      <foaf:name>Christopher Davis</foaf:name>
+      <foaf:mbox rdf:resource="mailto:christopherdavis gnome org" />
+      <gnome:userid>christopherdavis</gnome:userid>
+    </foaf:Person>
+  </maintainer>
   <maintainer>
     <foaf:Person>
       <foaf:name>Guido Günther</foaf:name>