[fix] Make perl-core/Module-Build 0.400.400 actually that version

Package-Manager: portage-2.2.0_alpha174
Manifest-Sign-Key: ECD2C675C102CDA4
[parallelize] parallelize tests for Module::Build

Package-Manager: portage-2.2.0_alpha174
Manifest-Sign-Key: ECD2C675C102CDA4