In combination with the relevant changes in opm-common this
prevent flow in binary Linux packages from having a timestamp in the
executable that changes with every rebuild.
With the changes in opm-common one can now set the variable
OPM_BINARY_PACKAGE_VERSION to a meaningful version string (Debian
11.2: 2021.10-4). If that is done and flow is built from tarballs it
will now not have a time stamp and print the package version to the
PRT file. E.g.
Flow Version = 2021.10 (Debian 11.2: 2021.10-1)