common: install pacman-contrib explicitly

roles/common/tasks/main.yml

@@ -98,5 +98,8 @@
 - name: install checkservices
   copy: src=archutils/checkservices dest=/usr/local/bin/checkservices owner=root group=root mode=0755
 
+- name: install pacman-contrib
+  pacman: name=pacman-contrib state=installed
+
 - name: install pacman config
   template: src=pacman.conf.j2 dest=/etc/pacman.conf mode=0644 owner=root group=root