To ensure QtCore can be rebuilt and get the exact same results,
it is undesirable to hardcode the build date into the library
Also deprecate QLibrayInfo::buildDate since it is relies on the build
date. QLibraryInfo::buildDate was originally meant for evaluation
licenses and such, but isn't used for that any longer.
Change-Id: I98e91ca3e55f877e6ac0e02de289dc29422fc9da
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>