Buck: Export velocity for in tree plugin build
Buck: Export velocity for in tree plugin build

gerrit-server transitively depends on lib:velocity, and thus this
dependency was always included in gerrit-plugin-api. Exporting it
allows in tree plugin to also depends on it, without mentioning it
as explicit dependency, which would unnecessarily complicate
standalone build implementation.

This change can be used to simplify Buck in tree and standalone
build implementations for its-* plugins.

Change-Id: Ide02bc5d3eae841ae88675981b1d7d01df4fed66

pkdevbox/gerrit,renchaorevee/gerrit,gerrit-review/gerrit,WANdisco/gerrit,WANdisco/gerrit,supriyantomaftuh/gerrit,renchaorevee/gerrit,supriyantomaftuh/gerrit,WANdisco/gerrit,MerritCR/merrit,joshuawilson/merrit,qtproject/qtqa-gerrit,pkdevbox/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,joshuawilson/merrit,WANdisco/gerrit,joshuawilson/merrit,gerrit-review/gerrit,qtproject/qtqa-gerrit,supriyantomaftuh/gerrit,renchaorevee/gerrit,pkdevbox/gerrit,gerrit-review/gerrit,renchaorevee/gerrit,pkdevbox/gerrit,GerritCodeReview/gerrit,pkdevbox/gerrit,WANdisco/gerrit,renchaorevee/gerrit,MerritCR/merrit,GerritCodeReview/gerrit,MerritCR/merrit,joshuawilson/merrit,WANdisco/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,MerritCR/merrit,MerritCR/merrit,supriyantomaftuh/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,renchaorevee/gerrit,qtproject/qtqa-gerrit,joshuawilson/merrit,MerritCR/merrit,pkdevbox/gerrit,joshuawilson/merrit,MerritCR/merrit,MerritCR/merrit,joshuawilson/merrit,supriyantomaftuh/gerrit,qtproject/qtqa-gerrit,supriyantomaftuh/gerrit,qtproject/qtqa-gerrit,renchaorevee/gerrit,joshuawilson/merrit,gerrit-review/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,pkdevbox/gerrit,supriyantomaftuh/gerrit,gerrit-review/gerrit