mirage-mtime -- libraries for a monotonic clock

This library implements portable support for an operating system timesource that is compatible with the MirageOS library interfaces found in: https://github.com/mirage/mirage

It implements a Mirage_mtime module that represents a monotonic timesource since an arbitrary point.

The following sources are used:

• The Unix version uses Mtime_clock,
• The freestanding version uses the paravirtual clock source from the hypervisor.