Explain extra_options more clearly.
Explain extra_options more clearly.

--
MOS_MIGRATED_REVID=92152092

kamalmarhubi/bazel,Topher-the-Geek/bazel,spxtr/bazel,juhalindfors/bazel-patches,hermione521/bazel,snnn/bazel,rohitsaboo/bazel,murugamsm/bazel,snnn/bazel,dslomov/bazel,kidaa/bazel,LuminateWireless/bazel,kidaa/bazel,nkhuyu/bazel,perezd/bazel,rzagabe/bazel,kchodorow/bazel-1,ulfjack/bazel,LuminateWireless/bazel,xindaya/bazel,Topher-the-Geek/bazel,Digas29/bazel,whuwxl/bazel,perezd/bazel,meteorcloudy/bazel,safarmer/bazel,asarazan/bazel,dropbox/bazel,hhclam/bazel,charlieaustin/bazel,Krasnyanskiy/bazel,zhexuany/bazel,dhootha/bazel,bitemyapp/bazel,safarmer/bazel,mrdomino/bazel,dinowernli/bazel,variac/bazel,asarazan/bazel,hermione521/bazel,werkt/bazel,murugamsm/bazel,joshua0pang/bazel,akira-baruah/bazel,sicipio/bazel,spxtr/bazel,damienmg/bazel,gavares/bazel,safarmer/bazel,UrbanCompass/bazel,charlieaustin/bazel,d/bazel,anupcshan/bazel,Topher-the-Geek/bazel,wakashige/bazel,bitemyapp/bazel,nkhuyu/bazel,kidaa/bazel,spxtr/bazel,charlieaustin/bazel,katre/bazel,dhootha/bazel,bazelbuild/bazel,ButterflyNetwork/bazel,xindaya/bazel,vt09/bazel,dhootha/bazel,manashmndl/bazel,aehlig/bazel,cushon/bazel,damienmg/bazel,mbrukman/bazel,xindaya/bazel,dhootha/bazel,perezd/bazel,wakashige/bazel,kidaa/bazel,kamalmarhubi/bazel,LuminateWireless/bazel,sicipio/bazel,wakashige/bazel,juhalindfors/bazel-patches,joshua0pang/bazel,rohitsaboo/bazel,ruo91/bazel,bitemyapp/bazel,anupcshan/bazel,juhalindfors/bazel-patches,nkhuyu/bazel,rhuss/bazel,katre/bazel,cushon/bazel,mbrukman/bazel,akira-baruah/bazel,mrdomino/bazel,Topher-the-Geek/bazel,UrbanCompass/bazel,akira-baruah/bazel,manashmndl/bazel,vt09/bazel,dslomov/bazel,Ansahmadiba/bazel,werkt/bazel,rzagabe/bazel,gavares/bazel,Topher-the-Geek/bazel,hhclam/bazel,UrbanCompass/bazel,dslomov/bazel-windows,meteorcloudy/bazel,Digas29/bazel,werkt/bazel,charlieaustin/bazel,abergmeier-dsfishlabs/bazel,bazelbuild/bazel,wakashige/bazel,mrdomino/bazel,dslomov/bazel,gavares/bazel,rhuss/bazel,asarazan/bazel,kidaa/bazel,ulfjack/bazel,dropbox/bazel,mikelalcon/bazel,manashmndl/bazel,rzagabe/bazel,davidzchen/bazel,manashmndl/bazel,Topher-the-Geek/bazel,dinowernli/bazel,snnn/bazel,asarazan/bazel,kchodorow/bazel-1,dslomov/bazel-windows,ulfjack/bazel,abergmeier-dsfishlabs/bazel,dinowernli/bazel,twitter-forks/bazel,mikelalcon/bazel,rhuss/bazel,safarmer/bazel,meteorcloudy/bazel,rohitsaboo/bazel,murugamsm/bazel,ButterflyNetwork/bazel,davidzchen/bazel,aehlig/bazel,perezd/bazel,iamthearm/bazel,nkhuyu/bazel,Ansahmadiba/bazel,whuwxl/bazel,mrdomino/bazel,dhootha/bazel,nkhuyu/bazel,kchodorow/bazel-1,xindaya/bazel,kchodorow/bazel-1,zhexuany/bazel,dslomov/bazel,dslomov/bazel-windows,ruo91/bazel,hhclam/bazel,Krasnyanskiy/bazel,kchodorow/bazel,katre/bazel,Krasnyanskiy/bazel,anupcshan/bazel,anupcshan/bazel,Krasnyanskiy/bazel,UrbanCompass/bazel,Krasnyanskiy/bazel,twitter-forks/bazel,mikelikespie/bazel,kchodorow/bazel-1,katre/bazel,dinowernli/bazel,aehlig/bazel,kchodorow/bazel,Digas29/bazel,ButterflyNetwork/bazel,xindaya/bazel,dropbox/bazel,hhclam/bazel,bitemyapp/bazel,asarazan/bazel,Krasnyanskiy/bazel,asarazan/bazel,JackSullivan/bazel,davidzchen/bazel,aehlig/bazel,snnn/bazel,variac/bazel,gavares/bazel,kchodorow/bazel,aehlig/bazel,gavares/bazel,variac/bazel,twitter-forks/bazel,rhuss/bazel,abergmeier-dsfishlabs/bazel,aehlig/bazel,sicipio/bazel,vt09/bazel,zhexuany/bazel,rhuss/bazel,Ansahmadiba/bazel,d/bazel,kidaa/bazel,bitemyapp/bazel,manashmndl/bazel,davidzchen/bazel,bitemyapp/bazel,gavares/bazel,Digas29/bazel,Digas29/bazel,zhexuany/bazel,kamalmarhubi/bazel,davidzchen/bazel,mikelikespie/bazel,kamalmarhubi/bazel,twitter-forks/bazel,JackSullivan/bazel,cushon/bazel,kchodorow/bazel,rohitsaboo/bazel,d/bazel,vt09/bazel,hermione521/bazel,Ansahmadiba/bazel,rohitsaboo/bazel,variac/bazel,ulfjack/bazel,dropbox/bazel,charlieaustin/bazel,xindaya/bazel,katre/bazel,damienmg/bazel,ButterflyNetwork/bazel,werkt/bazel,joshua0pang/bazel,sicipio/bazel,meteorcloudy/bazel,dhootha/bazel,ButterflyNetwork/bazel,Ansahmadiba/bazel,perezd/bazel,variac/bazel,JackSullivan/bazel,UrbanCompass/bazel,meteorcloudy/bazel,Asana/bazel,safarmer/bazel,bitemyapp/bazel,vt09/bazel,dslomov/bazel,mikelalcon/bazel,kamalmarhubi/bazel,kchodorow/bazel,bazelbuild/bazel,manashmndl/bazel,JackSullivan/bazel,LuminateWireless/bazel,werkt/bazel,variac/bazel,juhalindfors/bazel-patches,akira-baruah/bazel,joshua0pang/bazel,Asana/bazel,dropbox/bazel,hhclam/bazel,manashmndl/bazel,meteorcloudy/bazel,dslomov/bazel-windows,mbrukman/bazel,dinowernli/bazel,Topher-the-Geek/bazel,rhuss/bazel,wakashige/bazel,bitemyapp/bazel,perezd/bazel,hermione521/bazel,kchodorow/bazel-1,mikelikespie/bazel,joshua0pang/bazel,iamthearm/bazel,vt09/bazel,twitter-forks/bazel,sicipio/bazel,spxtr/bazel,gavares/bazel,juhalindfors/bazel-patches,rzagabe/bazel,whuwxl/bazel,rzagabe/bazel,joshua0pang/bazel,kchodorow/bazel,werkt/bazel,LuminateWireless/bazel,ulfjack/bazel,safarmer/bazel,cushon/bazel,zhexuany/bazel,sicipio/bazel,ruo91/bazel,snnn/bazel,charlieaustin/bazel,nkhuyu/bazel,charlieaustin/bazel,dropbox/bazel,Ansahmadiba/bazel,Asana/bazel,juhalindfors/bazel-patches,mbrukman/bazel,d/bazel,iamthearm/bazel,xindaya/bazel,whuwxl/bazel,cushon/bazel,ruo91/bazel,murugamsm/bazel,Ansahmadiba/bazel,twitter-forks/bazel,Krasnyanskiy/bazel,hermione521/bazel,akira-baruah/bazel,UrbanCompass/bazel,ulfjack/bazel,snnn/bazel,ruo91/bazel,wakashige/bazel,mikelalcon/bazel,twitter-forks/bazel,kamalmarhubi/bazel,JackSullivan/bazel,mrdomino/bazel,murugamsm/bazel,Asana/bazel,rzagabe/bazel,Krasnyanskiy/bazel,bazelbuild/bazel,whuwxl/bazel,mbrukman/bazel,dinowernli/bazel,mikelalcon/bazel,rzagabe/bazel,vt09/bazel,d/bazel,zhexuany/bazel,ButterflyNetwork/bazel,damienmg/bazel,Digas29/bazel,snnn/bazel,Asana/bazel,dslomov/bazel-windows,dslomov/bazel-windows,asarazan/bazel,bazelbuild/bazel,hhclam/bazel,mikelikespie/bazel,murugamsm/bazel,JackSullivan/bazel,anupcshan/bazel,sicipio/bazel,abergmeier-dsfishlabs/bazel,katre/bazel,aehlig/bazel,dslomov/bazel,abergmeier-dsfishlabs/bazel,damienmg/bazel,kidaa/bazel,iamthearm/bazel,variac/bazel,spxtr/bazel,kchodorow/bazel,rohitsaboo/bazel,d/bazel,dslomov/bazel,JackSullivan/bazel,spxtr/bazel,LuminateWireless/bazel,Topher-the-Geek/bazel,meteorcloudy/bazel,mikelalcon/bazel,rhuss/bazel,kidaa/bazel,d/bazel,mbrukman/bazel,spxtr/bazel,abergmeier-dsfishlabs/bazel,davidzchen/bazel,joshua0pang/bazel,murugamsm/bazel,damienmg/bazel,mrdomino/bazel,ruo91/bazel,Asana/bazel,davidzchen/bazel,gavares/bazel,damienmg/bazel,wakashige/bazel,ulfjack/bazel,ruo91/bazel,iamthearm/bazel,iamthearm/bazel,bazelbuild/bazel,hermione521/bazel,juhalindfors/bazel-patches,perezd/bazel,mikelikespie/bazel,cushon/bazel,Asana/bazel,akira-baruah/bazel,mikelikespie/bazel,rzagabe/bazel,nkhuyu/bazel,dhootha/bazel,whuwxl/bazel,anupcshan/bazel