devel/py-time-machine: Add new port
time-machine, is intended to combine the advantages of freezegun and
libfaketime Python modules. It works without LD_PRELOAD but still mocks
the standard library functions everywhere they may be referenced.
It does so by modifying the built-in functions at the C level, to point
them through wrappers that return different values when mocking.
Normally in Python, built-in functions are immutable, but
time-machine overcomes this by using C code to replace their function
pointers.