Buck: Export gerrit-antlr artifacts to plugin-api library
Buck: Export gerrit-antlr artifacts to plugin-api library

Because of missing export for gerrit-antlr artifacts in tree Gerrit
plugin cannot compile when they reference gerrit antlr classes. For
example reviewers plugin needs it.  Fix by exporting these classes,
as it is already the case for other projects, like gerrit-common.

Change-Id: I9e5832310271821c1bf355841ad32ff92f60000a

gerrit-review/gerrit,thinkernel/gerrit,pkdevbox/gerrit,netroby/gerrit,qtproject/qtqa-gerrit,WANdisco/gerrit,WANdisco/gerrit,jackminicloud/test,hdost/gerrit,GerritCodeReview/gerrit,thesamet/gerrit,Overruler/gerrit,jackminicloud/test,joshuawilson/merrit,pkdevbox/gerrit,GerritCodeReview/gerrit,netroby/gerrit,anminhsu/gerrit,gcoders/gerrit,gcoders/gerrit,Team-OctOS/host_gerrit,joshuawilson/merrit,Overruler/gerrit,MerritCR/merrit,gcoders/gerrit,pkdevbox/gerrit,dwhipstock/gerrit,jackminicloud/test,midnightradio/gerrit,thinkernel/gerrit,midnightradio/gerrit,netroby/gerrit,supriyantomaftuh/gerrit,Team-OctOS/host_gerrit,dwhipstock/gerrit,Seinlin/gerrit,supriyantomaftuh/gerrit,joshuawilson/merrit,thinkernel/gerrit,jackminicloud/test,dwhipstock/gerrit,Team-OctOS/host_gerrit,MerritCR/merrit,anminhsu/gerrit,jackminicloud/test,gerrit-review/gerrit,Seinlin/gerrit,quyixia/gerrit,thesamet/gerrit,gerrit-review/gerrit,Distrotech/gerrit,TonyChai24/test,Seinlin/gerrit,dwhipstock/gerrit,renchaorevee/gerrit,jackminicloud/test,netroby/gerrit,TonyChai24/test,GerritCodeReview/gerrit,Overruler/gerrit,Distrotech/gerrit,gcoders/gerrit,GerritCodeReview/gerrit,Overruler/gerrit,hdost/gerrit,anminhsu/gerrit,MerritCR/merrit,WANdisco/gerrit,renchaorevee/gerrit,MerritCR/merrit,qtproject/qtqa-gerrit,netroby/gerrit,anminhsu/gerrit,qtproject/qtqa-gerrit,Seinlin/gerrit,Seinlin/gerrit,quyixia/gerrit,supriyantomaftuh/gerrit,joshuawilson/merrit,hdost/gerrit,jackminicloud/test,GerritCodeReview/gerrit,thesamet/gerrit,qtproject/qtqa-gerrit,thinkernel/gerrit,hdost/gerrit,WANdisco/gerrit,gerrit-review/gerrit,quyixia/gerrit,supriyantomaftuh/gerrit,quyixia/gerrit,renchaorevee/gerrit,dwhipstock/gerrit,hdost/gerrit,MerritCR/merrit,Seinlin/gerrit,renchaorevee/gerrit,supriyantomaftuh/gerrit,thinkernel/gerrit,anminhsu/gerrit,gerrit-review/gerrit,joshuawilson/merrit,Overruler/gerrit,midnightradio/gerrit,qtproject/qtqa-gerrit,supriyantomaftuh/gerrit,gerrit-review/gerrit,pkdevbox/gerrit,gcoders/gerrit,MerritCR/merrit,Distrotech/gerrit,hdost/gerrit,quyixia/gerrit,anminhsu/gerrit,Overruler/gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,Distrotech/gerrit,MerritCR/merrit,thinkernel/gerrit,TonyChai24/test,gerrit-review/gerrit,midnightradio/gerrit,joshuawilson/merrit,renchaorevee/gerrit,pkdevbox/gerrit,thinkernel/gerrit,TonyChai24/test,thesamet/gerrit,dwhipstock/gerrit,GerritCodeReview/gerrit,TonyChai24/test,hdost/gerrit,WANdisco/gerrit,anminhsu/gerrit,quyixia/gerrit,Seinlin/gerrit,WANdisco/gerrit,renchaorevee/gerrit,Distrotech/gerrit,joshuawilson/merrit,quyixia/gerrit,MerritCR/merrit,Team-OctOS/host_gerrit,pkdevbox/gerrit,Team-OctOS/host_gerrit,dwhipstock/gerrit,midnightradio/gerrit,thesamet/gerrit,TonyChai24/test,WANdisco/gerrit,Distrotech/gerrit,renchaorevee/gerrit,supriyantomaftuh/gerrit,qtproject/qtqa-gerrit,TonyChai24/test,qtproject/qtqa-gerrit,pkdevbox/gerrit,midnightradio/gerrit,Team-OctOS/host_gerrit,Team-OctOS/host_gerrit,gcoders/gerrit,gcoders/gerrit,thesamet/gerrit,joshuawilson/merrit,netroby/gerrit,Distrotech/gerrit,netroby/gerrit,thesamet/gerrit