Add missing Perl::Critic::Module::Build::Standard

See issue #1, an error in the .gitignore caused this file to be incorrectly ignored.

I grabbed the file from the latest release at http://api.metacpan.org/source/THALJEF/Perl-Critic-1.118/inc/Perl/Critic/Module/Build/Standard.pm. Once you add this file, Build.PL works again.

Thank you for considering this pull request (please note that issue #1 is a de facto prerequisite for this pull).