Upgrade passenger_binary_build_automation
Upgrade passenger_binary_build_automation

macOS: install our gem bundle into the runtime directory instead of the Ruby interpreter's native gem home

This way the CI server can run multiple setup-runtime instances simultaneously,
provided that they use different runtime directories.

phusion/passenger,phusion/passenger,phusion/passenger,phusion/passenger,phusion/passenger,phusion/passenger,phusion/passenger,phusion/passenger