Change libfaketime path search procedure
Path is searched in following localizations, in this orded:
- default installation path when building from sources (
- default Ubuntu package installation path (
Warning is emitted when libfaketime from Ubuntu package repository is used, because of missing features in older version provided by Ubuntu20's package repository, which might be required by some tests based on TestTools.
Added installation manual, which is showed in case of configuration problem.
Use version which supports multithreaded programs
hived is a multithreaded program, thus we should use libfaketime which supports multithreading.