Added a section in contributing.md for debugging Bazel
Added a section in contributing.md for debugging Bazel

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MOS_MIGRATED_REVID=89030601

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