Clean up and fix FTBFS (#914249)
    
    - BR: perl(base), perl(Carp), perl(ExtUtils::MakeMaker) and perl(Sub::Name),
      fixing FTBFS (#914249)
    - Enhance %description
    - Drop %defattr, redundant since rpm 4.4
    - Don't need to remove empty directories from the buildroot
    - Don't use macros for commands
    - Use DESTDIR rather than PERL_INSTALL_ROOT
    - Use %{_fixperms} macro rather than our own chmod incantation
    - Make %files list more explicit