Update last year information on tcar_printCopyrightInfo function.
    
    - Previously, when the --version option was executed, tcar printed the
      current year in the copyright sentence. This is confusing since the
      script might release in previous years and having a recent year
      information printed may give the idea of recent software. In order
      to prevent this kind of confusion, this update changes
      tcar_printCopyrightInfo function to retrieve the last year
      information from the build time of tcar package. The build time of
      the rpm package is much more accurate than using the current year
      information dynamically.