Bazel compile.sh: test for existence of the protoc compiler
Bazel compile.sh: test for existence of the protoc compiler

Tested with removing the protoc binaries from a github copy.

Fixes #128.

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MOS_MIGRATED_REVID=91297812

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