[build] Add Gherkin/Perl to the parallel build
[build] Add Gherkin/Perl to the parallel build

Based on the example from Gherkin/dotNet, add Perl tests to the
parallel build.

cucumber/cucumber,cucumber/cucumber,cucumber/cucumber,cucumber/cucumber,cucumber/cucumber,cucumber/cucumber,cucumber/cucumber,cucumber/cucumber,cucumber/cucumber,cucumber/cucumber,cucumber/cucumber,cucumber/cucumber