Summary
- Set gcc mediator to 4.9 by default (commit: 475971d) (details)
- Move gcc49 to developer, bump revision and add REQUIRED_PACKAGES (commit: 2a86083) (details)
- Add pkgtree to oi-userland (commit: 9e2024e) (details)
- Add pkgtree to build-essential (commit: 304b566) (details)