Move locale support to base image

Summary: Fixes T1073

Test Plan:
Rebuild the image in the top of amended base image.
Run a shell and ensure UTF-8 characters work.

Reviewers: dereckson

Reviewed By: dereckson

Subscribers: Nasqueron Docker deployment squad

Tags: Docker images

Maniphest Tasks: T1073

Differential Revision: https://devcentral.nasqueron.org/D765