Fix java_antlr_library target

Testing Done:
with this local changes on my laptop, the failing target now passes.

[tw-mbp13-tdesai birdcage]$ ./pants goal list ./eventbus/thrift/src/main/antlr/com/twitter/eventbus/thrift/tql/BUILD::
eventbus/thrift/src/main/antlr/com/twitter/eventbus/thrift/tql/BUILD:tql
[tw-mbp13-tdesai birdcage]$

Bugs closed: 215

Reviewed at https://rbcommons.com/s/twitter/r/503/