Create software build account

Summary:
Account 'builder' can be used to install software, so a non privileged
account is used to operations like git clone, ./configure or make.

The group 'deployment' will contain deployment accounts, and users
allowed to sudo to these groups.

Ref T1159

Test Plan:

• check builder account exists
• check deployment group exists
• test sudo -u builder whoami

Reviewers: dereckson

Reviewed By: dereckson

Maniphest Tasks: T1159

Differential Revision: https://devcentral.nasqueron.org/D923