gnu: Add ruby-hashicorp-checkpoint.

* gnu/packages/ruby.scm (ruby-hashicorp-checkpoint): New variable.

gnu: Add ruby-vagrant-spec-helper-basic.

* gnu/packages/virtualization.scm (ruby-vagrant-spec-helper-basic): New variable.

gnu: Add ruby-vagrant-spec.

* gnu/packages/virtualization.scm (ruby-vagrant-spec): New variable.

gnu: Add ruby-vagrant-cloud.

* gnu/packages/ruby.scm (ruby-vagrant-cloud): New variable.

gnu: Add ruby-grpc.

* gnu/packages/ruby.scm (ruby-grpc): New variable.

gnu: Add ruby-googleapis-common-protos-types.

* gnu/packages/ruby.scm (ruby-googleapis-common-protos-types): New variable.

gnu: Add ruby-google-protobuf.

* gnu/packages/ruby.scm (ruby-google-protobuf): New variable.

gnu: Add ruby-time.

* gnu/packages/ruby.scm (ruby-time): New variable.

gnu: Add ruby-serverspec.

* gnu/packages/ruby.scm (ruby-serverspec): New variable.

gnu: Add ruby-specinfra.

* gnu/packages/ruby.scm (ruby-specinfra): New variable.

gnu: Add ruby-sfl.

* gnu/packages/ruby.scm (ruby-sfl): New variable.

gnu: Add ruby-rgl.

* gnu/packages/ruby.scm (ruby-rgl): New variable.

gnu: Add ruby-stream.

* gnu/packages/ruby.scm (ruby-stream): New variable.

gnu: Add ruby-stringio.

* gnu/packages/ruby.scm (ruby-stringio): New variable.

gnu: Add ruby-pairing-heap.

* gnu/packages/ruby.scm (ruby-pairing-heap): New variable.

gnu: Add ruby-net-telnet.

* gnu/packages/ruby.scm (ruby-net-telnet): New variable.

gnu: Add ruby-net-sftp.

* gnu/packages/ruby.scm (ruby-net-sftp): New variable.

gnu: Add ruby-fake-ftp.

* gnu/packages/ruby.scm (ruby-fake-ftp): New variable.

gnu: Add ruby-net-ftp.

* gnu/packages/ruby.scm (ruby-net-ftp): New variable.

gnu: Add ruby-ipaddr.

* gnu/packages/ruby.scm (ruby-ipaddr): New variable.