Merge branch 'ab/perl-makefile-cleanup'

Build procedure clean-up. * ab/perl-makefile-cleanup: Makefile: make PERL_DEFINES recursively expanded perl: use mock i18n functions under NO_GETTEXT=Y Makefile: regenerate *.pm on NO_PERL_CPAN_FALLBACKS change Makefile: regenerate perl/build/* if GIT-PERL-DEFINES changes Makefile: don't re-define PERL_DEFINES