Some devices have a working but non-writable real-time clock (RTC).
This package contains two shell scripts: One writes the offset between
'hwclock' and 'swclock' to a file at shutdown, another one reads the
offset from the file at boot and sets the 'swclock'. This way the system
time in userspace is kept in present time.
[ci:skip-build] already built successfully in CI
