Fix ant build when using it to build something outside of Buck repo
Fix ant build when using it to build something outside of Buck repo

Summary: My previous change broke ant Buck when it's used outside of the Buck repository.

Test Plan: Try to use it outside of Buck repository, check that it works.

Reviewed By: ttsugriy

fbshipit-source-id: d42d41c

zpao/buck,brettwooldridge/buck,Addepar/buck,clonetwin26/buck,LegNeato/buck,facebook/buck,ilya-klyuchnikov/buck,brettwooldridge/buck,brettwooldridge/buck,romanoid/buck,kageiit/buck,SeleniumHQ/buck,shs96c/buck,LegNeato/buck,kageiit/buck,romanoid/buck,shs96c/buck,rmaz/buck,Addepar/buck,LegNeato/buck,JoelMarcey/buck,shs96c/buck,JoelMarcey/buck,ilya-klyuchnikov/buck,LegNeato/buck,Addepar/buck,rmaz/buck,nguyentruongtho/buck,ilya-klyuchnikov/buck,kageiit/buck,brettwooldridge/buck,rmaz/buck,JoelMarcey/buck,romanoid/buck,facebook/buck,nguyentruongtho/buck,shs96c/buck,clonetwin26/buck,ilya-klyuchnikov/buck,JoelMarcey/buck,rmaz/buck,facebook/buck,JoelMarcey/buck,shs96c/buck,JoelMarcey/buck,facebook/buck,clonetwin26/buck,SeleniumHQ/buck,ilya-klyuchnikov/buck,ilya-klyuchnikov/buck,shs96c/buck,JoelMarcey/buck,zpao/buck,romanoid/buck,shs96c/buck,romanoid/buck,SeleniumHQ/buck,nguyentruongtho/buck,shs96c/buck,shs96c/buck,brettwooldridge/buck,zpao/buck,romanoid/buck,shs96c/buck,LegNeato/buck,clonetwin26/buck,ilya-klyuchnikov/buck,facebook/buck,brettwooldridge/buck,brettwooldridge/buck,Addepar/buck,rmaz/buck,SeleniumHQ/buck,Addepar/buck,zpao/buck,clonetwin26/buck,romanoid/buck,brettwooldridge/buck,facebook/buck,clonetwin26/buck,romanoid/buck,brettwooldridge/buck,clonetwin26/buck,ilya-klyuchnikov/buck,SeleniumHQ/buck,Addepar/buck,LegNeato/buck,romanoid/buck,brettwooldridge/buck,Addepar/buck,rmaz/buck,clonetwin26/buck,SeleniumHQ/buck,rmaz/buck,shs96c/buck,SeleniumHQ/buck,nguyentruongtho/buck,zpao/buck,LegNeato/buck,SeleniumHQ/buck,shs96c/buck,JoelMarcey/buck,LegNeato/buck,Addepar/buck,zpao/buck,rmaz/buck,kageiit/buck,JoelMarcey/buck,nguyentruongtho/buck,romanoid/buck,ilya-klyuchnikov/buck,ilya-klyuchnikov/buck,brettwooldridge/buck,shs96c/buck,JoelMarcey/buck,clonetwin26/buck,SeleniumHQ/buck,romanoid/buck,zpao/buck,brettwooldridge/buck,JoelMarcey/buck,romanoid/buck,rmaz/buck,JoelMarcey/buck,kageiit/buck,SeleniumHQ/buck,Addepar/buck,SeleniumHQ/buck,rmaz/buck,Addepar/buck,romanoid/buck,ilya-klyuchnikov/buck,ilya-klyuchnikov/buck,LegNeato/buck,Addepar/buck,Addepar/buck,LegNeato/buck,brettwooldridge/buck,nguyentruongtho/buck,rmaz/buck,JoelMarcey/buck,LegNeato/buck,ilya-klyuchnikov/buck,clonetwin26/buck,facebook/buck,rmaz/buck,clonetwin26/buck,rmaz/buck,SeleniumHQ/buck,kageiit/buck,clonetwin26/buck,clonetwin26/buck,LegNeato/buck,kageiit/buck,LegNeato/buck,nguyentruongtho/buck,Addepar/buck,SeleniumHQ/buck