`mentions-deprecated-usr-lib-perl5-directory`

As of Perl 5.20, the vendorarch directory is /usr/lib//perl5, but this package still uses usr/lib/perl5 in some of the files under debian/. Please replace that with the value of $Config{vendorarch} configuration parameter, e.g. $(shell perl -MConfig -wE'say substr($$Config{vendorarch},1)')