Merge pull request #7990 from ryanpetrello/build-needs-facts

gather facts for image builds so we can detect arch

Reviewed-by: Christian Adams <rooftopcellist@gmail.com>
             https://github.com/rooftopcellist

installer/build.yml

@@ -1,7 +1,7 @@
 ---
 - name: Build AWX Docker Images
   hosts: all
-  gather_facts: false
+  gather_facts: true
   roles:
     - {role: image_build}
     - {role: image_push, when: "docker_registry is defined"}