Arch Linux

Description:
Ruby package strips all bundled gems from it which causes problems when scripts expect bundled
gems to be present. Issue https://github.com/hanami/hanami/issues/893 for example is caused by this,
happens only on archlinux.

What is the reasoning for stripping the gems like this? Does it actually has benefits except small
saving in disk space (would argue mostly not relevant these days)?

In my opinion the bundled gems should not be stripped from the package (since they are supposed to
be always present). If they are stripped anyway, they should be at least made required dependencies
for `ruby` package (again, since they are supposed to be always present). Failing even that, they should
be at least all listed in optional dependecies with note saying `strongly recommended` or something.

Please consider ^_^

Additional info:
* ruby 2.5.0p0 (2017-12-25 revision 61468) [x86_64-linux]


Steps to reproduce:
1. install ruby
2. clone hanami (https://github.com/hanami/hanami)
3. try to run it's setup script (./script/setup) <-- Fail due to missing builder