lint: Add custom lint check for console.log statements.
lint: Add custom lint check for console.log statements.

This was previously checked for by jslint, and eslint doesn't seem to
have a nice exclude rule for it.

sharmaeklavya2/zulip,christi3k/zulip,andersk/zulip,isht3/zulip,dhcrzf/zulip,zacps/zulip,ryanbackman/zulip,peguin40/zulip,shubhamdhama/zulip,isht3/zulip,jphilipsen05/zulip,sonali0901/zulip,eeshangarg/zulip,tommyip/zulip,jrowan/zulip,christi3k/zulip,vabs22/zulip,PhilSk/zulip,rishig/zulip,dattatreya303/zulip,AZtheAsian/zulip,sharmaeklavya2/zulip,tommyip/zulip,AZtheAsian/zulip,cosmicAsymmetry/zulip,brainwane/zulip,JPJPJPOPOP/zulip,aakash-cr7/zulip,vabs22/zulip,niftynei/zulip,dhcrzf/zulip,cosmicAsymmetry/zulip,samatdav/zulip,zulip/zulip,verma-varsha/zulip,jackrzhang/zulip,hackerkid/zulip,shubhamdhama/zulip,JPJPJPOPOP/zulip,shubhamdhama/zulip,aakash-cr7/zulip,isht3/zulip,j831/zulip,PhilSk/zulip,rishig/zulip,isht3/zulip,kou/zulip,peguin40/zulip,andersk/zulip,blaze225/zulip,zulip/zulip,jphilipsen05/zulip,blaze225/zulip,souravbadami/zulip,dhcrzf/zulip,isht3/zulip,hackerkid/zulip,Galexrt/zulip,sharmaeklavya2/zulip,ryanbackman/zulip,SmartPeople/zulip,jrowan/zulip,peguin40/zulip,aakash-cr7/zulip,kou/zulip,vaidap/zulip,jackrzhang/zulip,zulip/zulip,amyliu345/zulip,shubhamdhama/zulip,synicalsyntax/zulip,jainayush975/zulip,souravbadami/zulip,TigorC/zulip,Galexrt/zulip,punchagan/zulip,andersk/zulip,vabs22/zulip,KingxBanana/zulip,Diptanshu8/zulip,JPJPJPOPOP/zulip,samatdav/zulip,KingxBanana/zulip,brainwane/zulip,TigorC/zulip,amyliu345/zulip,amanharitsh123/zulip,Galexrt/zulip,eeshangarg/zulip,aakash-cr7/zulip,Jianchun1/zulip,Jianchun1/zulip,Juanvulcano/zulip,dawran6/zulip,dattatreya303/zulip,samatdav/zulip,amyliu345/zulip,zulip/zulip,christi3k/zulip,hackerkid/zulip,Juanvulcano/zulip,KingxBanana/zulip,punchagan/zulip,synicalsyntax/zulip,kou/zulip,sonali0901/zulip,punchagan/zulip,shubhamdhama/zulip,tommyip/zulip,punchagan/zulip,Diptanshu8/zulip,rht/zulip,shubhamdhama/zulip,vaidap/zulip,niftynei/zulip,blaze225/zulip,rht/zulip,jrowan/zulip,zacps/zulip,christi3k/zulip,Juanvulcano/zulip,joyhchen/zulip,brockwhittaker/zulip,susansls/zulip,shubhamdhama/zulip,sharmaeklavya2/zulip,vaidap/zulip,amanharitsh123/zulip,isht3/zulip,SmartPeople/zulip,dattatreya303/zulip,PhilSk/zulip,PhilSk/zulip,souravbadami/zulip,verma-varsha/zulip,sonali0901/zulip,TigorC/zulip,rishig/zulip,synicalsyntax/zulip,Jianchun1/zulip,TigorC/zulip,jackrzhang/zulip,synicalsyntax/zulip,jackrzhang/zulip,cosmicAsymmetry/zulip,amanharitsh123/zulip,brockwhittaker/zulip,arpith/zulip,vaidap/zulip,Diptanshu8/zulip,andersk/zulip,arpith/zulip,tommyip/zulip,Galexrt/zulip,dhcrzf/zulip,SmartPeople/zulip,kou/zulip,tommyip/zulip,punchagan/zulip,sharmaeklavya2/zulip,showell/zulip,kou/zulip,kou/zulip,amyliu345/zulip,Diptanshu8/zulip,Juanvulcano/zulip,mahim97/zulip,eeshangarg/zulip,souravbadami/zulip,amanharitsh123/zulip,AZtheAsian/zulip,rht/zulip,sharmaeklavya2/zulip,dawran6/zulip,zulip/zulip,arpith/zulip,vabs22/zulip,jphilipsen05/zulip,jainayush975/zulip,AZtheAsian/zulip,dawran6/zulip,jainayush975/zulip,verma-varsha/zulip,JPJPJPOPOP/zulip,susansls/zulip,joyhchen/zulip,showell/zulip,dawran6/zulip,Galexrt/zulip,Jianchun1/zulip,brockwhittaker/zulip,rht/zulip,KingxBanana/zulip,showell/zulip,amyliu345/zulip,jphilipsen05/zulip,PhilSk/zulip,niftynei/zulip,timabbott/zulip,AZtheAsian/zulip,brockwhittaker/zulip,zulip/zulip,PhilSk/zulip,vaidap/zulip,kou/zulip,Galexrt/zulip,joyhchen/zulip,brainwane/zulip,ryanbackman/zulip,verma-varsha/zulip,mahim97/zulip,timabbott/zulip,christi3k/zulip,ryanbackman/zulip,eeshangarg/zulip,jackrzhang/zulip,Jianchun1/zulip,verma-varsha/zulip,susansls/zulip,joyhchen/zulip,showell/zulip,amanharitsh123/zulip,susansls/zulip,j831/zulip,arpith/zulip,AZtheAsian/zulip,eeshangarg/zulip,cosmicAsymmetry/zulip,joyhchen/zulip,andersk/zulip,jrowan/zulip,brainwane/zulip,ryanbackman/zulip,dawran6/zulip,dhcrzf/zulip,sonali0901/zulip,ryanbackman/zulip,tommyip/zulip,joyhchen/zulip,punchagan/zulip,mahim97/zulip,SmartPeople/zulip,dattatreya303/zulip,susansls/zulip,arpith/zulip,andersk/zulip,samatdav/zulip,timabbott/zulip,jrowan/zulip,Galexrt/zulip,verma-varsha/zulip,niftynei/zulip,zacps/zulip,timabbott/zulip,brainwane/zulip,andersk/zulip,aakash-cr7/zulip,brockwhittaker/zulip,hackerkid/zulip,Juanvulcano/zulip,mahim97/zulip,blaze225/zulip,showell/zulip,christi3k/zulip,SmartPeople/zulip,arpith/zulip,vabs22/zulip,rht/zulip,dhcrzf/zulip,cosmicAsymmetry/zulip,peguin40/zulip,dattatreya303/zulip,jainayush975/zulip,eeshangarg/zulip,Juanvulcano/zulip,amanharitsh123/zulip,Jianchun1/zulip,j831/zulip,cosmicAsymmetry/zulip,showell/zulip,susansls/zulip,jackrzhang/zulip,TigorC/zulip,hackerkid/zulip,Diptanshu8/zulip,sonali0901/zulip,j831/zulip,zacps/zulip,Diptanshu8/zulip,KingxBanana/zulip,rishig/zulip,j831/zulip,tommyip/zulip,JPJPJPOPOP/zulip,mahim97/zulip,rishig/zulip,brainwane/zulip,dhcrzf/zulip,sonali0901/zulip,rishig/zulip,mahim97/zulip,rht/zulip,jackrzhang/zulip,souravbadami/zulip,KingxBanana/zulip,aakash-cr7/zulip,peguin40/zulip,peguin40/zulip,niftynei/zulip,jphilipsen05/zulip,j831/zulip,jainayush975/zulip,timabbott/zulip,timabbott/zulip,SmartPeople/zulip,JPJPJPOPOP/zulip,brainwane/zulip,eeshangarg/zulip,hackerkid/zulip,brockwhittaker/zulip,samatdav/zulip,dattatreya303/zulip,jrowan/zulip,jainayush975/zulip,punchagan/zulip,samatdav/zulip,zacps/zulip,synicalsyntax/zulip,synicalsyntax/zulip,blaze225/zulip,vabs22/zulip,jphilipsen05/zulip,synicalsyntax/zulip,rishig/zulip,zacps/zulip,blaze225/zulip,vaidap/zulip,zulip/zulip,amyliu345/zulip,timabbott/zulip,hackerkid/zulip,souravbadami/zulip,TigorC/zulip,dawran6/zulip,showell/zulip,rht/zulip,niftynei/zulip