bootstrap: include perf_hooks in the builtin snapshot
perf_hooks: refactor perf_hooks for snapshot building
- Move Performance and InternalPerformance to a new lib/internal/perf/performance.js
- Move now() getMilestoneTimestamp() into lib/internal/perf/utils.js
- Rename lib/internal/perf/perf.js to lib/internal/perf/performance_entry.js
- Refresh time origin at startup (this means the time origins could differ between snapshot building time and snapshot creation time)