gitlab-ci: Add speex and kate dependencies.

Ensure coverage of this code as well.

Kate isn't a popular extension, but we should still test the
integration code we have

.gitlab-ci.yml

@@ -5,7 +5,8 @@ build:
   stage: build
   before_script:
     - apt-get update &&
-      apt-get install -y libogg-dev libvorbis-dev libao-dev libflac-dev
+      apt-get install -y libogg-dev libvorbis-dev
+        libao-dev libflac-dev libspeex-dev libkate-dev liboggkate-dev
         gettext zip
   script:
     - ./autogen.sh