Enable running tools/run-mypy on a subdirectory.
Enable running tools/run-mypy on a subdirectory.

Previously tools/run-mypy could not run on a subdirectory properly
because run-mypy assumed exclude files to be in that subdirectory.

TigorC/zulip,samatdav/zulip,dhcrzf/zulip,Juanvulcano/zulip,Jianchun1/zulip,Diptanshu8/zulip,rishig/zulip,Galexrt/zulip,amanharitsh123/zulip,calvinleenyc/zulip,vaidap/zulip,grave-w-grave/zulip,samatdav/zulip,showell/zulip,niftynei/zulip,eeshangarg/zulip,ryanbackman/zulip,grave-w-grave/zulip,shubhamdhama/zulip,Jianchun1/zulip,Jianchun1/zulip,dattatreya303/zulip,peiwei/zulip,ahmadassaf/zulip,PhilSk/zulip,PhilSk/zulip,cosmicAsymmetry/zulip,peiwei/zulip,amyliu345/zulip,andersk/zulip,joyhchen/zulip,Juanvulcano/zulip,j831/zulip,timabbott/zulip,rht/zulip,rishig/zulip,showell/zulip,TigorC/zulip,dhcrzf/zulip,niftynei/zulip,rht/zulip,sharmaeklavya2/zulip,joyhchen/zulip,calvinleenyc/zulip,synicalsyntax/zulip,christi3k/zulip,tommyip/zulip,krtkmj/zulip,rht/zulip,umkay/zulip,AZtheAsian/zulip,tommyip/zulip,Jianchun1/zulip,blaze225/zulip,timabbott/zulip,peiwei/zulip,umkay/zulip,peguin40/zulip,zacps/zulip,paxapy/zulip,amyliu345/zulip,eeshangarg/zulip,verma-varsha/zulip,hackerkid/zulip,Jianchun1/zulip,KingxBanana/zulip,ryanbackman/zulip,KingxBanana/zulip,Vallher/zulip,punchagan/zulip,krtkmj/zulip,vikas-parashar/zulip,JPJPJPOPOP/zulip,dhcrzf/zulip,dhcrzf/zulip,punchagan/zulip,KingxBanana/zulip,amyliu345/zulip,sup95/zulip,Vallher/zulip,jackrzhang/zulip,krtkmj/zulip,brockwhittaker/zulip,j831/zulip,vabs22/zulip,jrowan/zulip,dattatreya303/zulip,Juanvulcano/zulip,sharmaeklavya2/zulip,Galexrt/zulip,mohsenSy/zulip,zulip/zulip,susansls/zulip,shubhamdhama/zulip,PhilSk/zulip,vikas-parashar/zulip,mahim97/zulip,Juanvulcano/zulip,jrowan/zulip,rht/zulip,christi3k/zulip,Diptanshu8/zulip,paxapy/zulip,arpith/zulip,tommyip/zulip,rishig/zulip,vabs22/zulip,arpith/zulip,isht3/zulip,jphilipsen05/zulip,isht3/zulip,Vallher/zulip,Vallher/zulip,hackerkid/zulip,punchagan/zulip,timabbott/zulip,dhcrzf/zulip,sonali0901/zulip,Juanvulcano/zulip,Diptanshu8/zulip,brockwhittaker/zulip,sharmaeklavya2/zulip,jphilipsen05/zulip,synicalsyntax/zulip,peiwei/zulip,samatdav/zulip,brainwane/zulip,jainayush975/zulip,joyhchen/zulip,amanharitsh123/zulip,rishig/zulip,souravbadami/zulip,zacps/zulip,amanharitsh123/zulip,susansls/zulip,synicalsyntax/zulip,joyhchen/zulip,brockwhittaker/zulip,sup95/zulip,cosmicAsymmetry/zulip,zacps/zulip,amyliu345/zulip,KingxBanana/zulip,AZtheAsian/zulip,reyha/zulip,eeshangarg/zulip,vaidap/zulip,vaidap/zulip,verma-varsha/zulip,dattatreya303/zulip,calvinleenyc/zulip,brainwane/zulip,reyha/zulip,paxapy/zulip,umkay/zulip,cosmicAsymmetry/zulip,niftynei/zulip,eeshangarg/zulip,jackrzhang/zulip,SmartPeople/zulip,christi3k/zulip,tommyip/zulip,niftynei/zulip,j831/zulip,dawran6/zulip,showell/zulip,SmartPeople/zulip,rishig/zulip,krtkmj/zulip,JPJPJPOPOP/zulip,JPJPJPOPOP/zulip,susansls/zulip,Galexrt/zulip,zacps/zulip,peiwei/zulip,KingxBanana/zulip,susansls/zulip,niftynei/zulip,AZtheAsian/zulip,synicalsyntax/zulip,andersk/zulip,jrowan/zulip,ahmadassaf/zulip,punchagan/zulip,AZtheAsian/zulip,sup95/zulip,aakash-cr7/zulip,brockwhittaker/zulip,tommyip/zulip,isht3/zulip,samatdav/zulip,andersk/zulip,zulip/zulip,timabbott/zulip,isht3/zulip,j831/zulip,brainwane/zulip,kou/zulip,ahmadassaf/zulip,christi3k/zulip,arpith/zulip,dawran6/zulip,umkay/zulip,Vallher/zulip,zulip/zulip,mahim97/zulip,SmartPeople/zulip,joyhchen/zulip,vaidap/zulip,sup95/zulip,ahmadassaf/zulip,jphilipsen05/zulip,jackrzhang/zulip,tommyip/zulip,dhcrzf/zulip,amanharitsh123/zulip,sharmaeklavya2/zulip,AZtheAsian/zulip,rishig/zulip,shubhamdhama/zulip,reyha/zulip,rht/zulip,TigorC/zulip,Galexrt/zulip,jainayush975/zulip,arpith/zulip,brockwhittaker/zulip,showell/zulip,peguin40/zulip,vikas-parashar/zulip,jainayush975/zulip,brainwane/zulip,Jianchun1/zulip,showell/zulip,j831/zulip,vabs22/zulip,sup95/zulip,synicalsyntax/zulip,verma-varsha/zulip,christi3k/zulip,punchagan/zulip,zulip/zulip,krtkmj/zulip,AZtheAsian/zulip,reyha/zulip,verma-varsha/zulip,andersk/zulip,zacps/zulip,umkay/zulip,punchagan/zulip,Juanvulcano/zulip,TigorC/zulip,vabs22/zulip,paxapy/zulip,mahim97/zulip,verma-varsha/zulip,JPJPJPOPOP/zulip,sharmaeklavya2/zulip,cosmicAsymmetry/zulip,calvinleenyc/zulip,rht/zulip,andersk/zulip,Vallher/zulip,dawran6/zulip,mohsenSy/zulip,souravbadami/zulip,Diptanshu8/zulip,amanharitsh123/zulip,mahim97/zulip,peiwei/zulip,shubhamdhama/zulip,brockwhittaker/zulip,peguin40/zulip,souravbadami/zulip,krtkmj/zulip,amanharitsh123/zulip,mohsenSy/zulip,jphilipsen05/zulip,hackerkid/zulip,kou/zulip,showell/zulip,Galexrt/zulip,hackerkid/zulip,jainayush975/zulip,punchagan/zulip,peguin40/zulip,Galexrt/zulip,mohsenSy/zulip,paxapy/zulip,calvinleenyc/zulip,susansls/zulip,amyliu345/zulip,eeshangarg/zulip,amyliu345/zulip,eeshangarg/zulip,ryanbackman/zulip,isht3/zulip,blaze225/zulip,andersk/zulip,j831/zulip,ryanbackman/zulip,sonali0901/zulip,timabbott/zulip,Galexrt/zulip,sharmaeklavya2/zulip,aakash-cr7/zulip,samatdav/zulip,samatdav/zulip,hackerkid/zulip,peguin40/zulip,shubhamdhama/zulip,KingxBanana/zulip,vikas-parashar/zulip,ryanbackman/zulip,kou/zulip,kou/zulip,mahim97/zulip,kou/zulip,TigorC/zulip,JPJPJPOPOP/zulip,sup95/zulip,blaze225/zulip,SmartPeople/zulip,souravbadami/zulip,synicalsyntax/zulip,sonali0901/zulip,cosmicAsymmetry/zulip,calvinleenyc/zulip,aakash-cr7/zulip,jackrzhang/zulip,verma-varsha/zulip,vikas-parashar/zulip,vabs22/zulip,andersk/zulip,rishig/zulip,jainayush975/zulip,JPJPJPOPOP/zulip,souravbadami/zulip,jackrzhang/zulip,brainwane/zulip,souravbadami/zulip,dattatreya303/zulip,christi3k/zulip,Diptanshu8/zulip,sonali0901/zulip,ahmadassaf/zulip,zulip/zulip,blaze225/zulip,brainwane/zulip,umkay/zulip,synicalsyntax/zulip,sonali0901/zulip,niftynei/zulip,shubhamdhama/zulip,ahmadassaf/zulip,vaidap/zulip,TigorC/zulip,jphilipsen05/zulip,blaze225/zulip,grave-w-grave/zulip,jphilipsen05/zulip,blaze225/zulip,isht3/zulip,zulip/zulip,aakash-cr7/zulip,susansls/zulip,vikas-parashar/zulip,Diptanshu8/zulip,jrowan/zulip,kou/zulip,cosmicAsymmetry/zulip,showell/zulip,kou/zulip,eeshangarg/zulip,PhilSk/zulip,hackerkid/zulip,mahim97/zulip,grave-w-grave/zulip,jrowan/zulip,grave-w-grave/zulip,vaidap/zulip,tommyip/zulip,jrowan/zulip,peguin40/zulip,PhilSk/zulip,jackrzhang/zulip,PhilSk/zulip,reyha/zulip,dattatreya303/zulip,mohsenSy/zulip,arpith/zulip,timabbott/zulip,dawran6/zulip,dattatreya303/zulip,dhcrzf/zulip,paxapy/zulip,grave-w-grave/zulip,peiwei/zulip,brainwane/zulip,jackrzhang/zulip,sonali0901/zulip,vabs22/zulip,hackerkid/zulip,jainayush975/zulip,krtkmj/zulip,zacps/zulip,zulip/zulip,umkay/zulip,timabbott/zulip,joyhchen/zulip,aakash-cr7/zulip,mohsenSy/zulip,SmartPeople/zulip,reyha/zulip,aakash-cr7/zulip,ahmadassaf/zulip,shubhamdhama/zulip,SmartPeople/zulip,dawran6/zulip,dawran6/zulip,Vallher/zulip,arpith/zulip,rht/zulip,ryanbackman/zulip