Install gobject-introspection for devel role

roles/devel/tasks/main.yml

@@ -6,6 +6,8 @@
     - git
     - gcc
     - glib2-devel
+    - gobject-introspection
+    - gobject-introspection-devel
     - json-glib-devel
     - python-gobject2-devel
     - python-numpy-devel