Don't run the release tests when bootstrapping, tidy up
    
    - Don't run the release tests when bootstrapping, to avoid circular build deps
    - Sync buildreqs with upstream:
      - BR: perl(Exporter)
      - BR: perl(ExtUtils::MakeMaker) ≥ 6.42
      - BR: perl(File::Spec) ≥ 0.80
      - Bump perl(Pod::Simple) version requirement to at least 3.07
      - BR: perl(Test::Builder)
      - Drop perl(Test::More) version requirement to a minimum of 0.42
    - Make %files list more explicit
    - Drop %defattr, redundant since rpm 4.4
    - Use %{_fixperms} macro rather than our own chmod incantation
    - Don't need to remove empty directories from the buildroot
    - Use DESTDIR rather than PERL_INSTALL_ROOT
    - Don't use macros for commands