python: don't add user site directory to path for in-place binaries
python: don't add user site directory to path for in-place binaries

Summary:
Start the python instances for in-place binaries with `-s` to prevent
the users site directory from being added to the path.

Test Plan: CI

Reviewed By: aiked

fbshipit-source-id: 3620d30

shybovycha/buck,robbertvanginkel/buck,sdwilsh/buck,justinmuller/buck,sdwilsh/buck,JoelMarcey/buck,JoelMarcey/buck,vschs007/buck,rmaz/buck,darkforestzero/buck,zhan-xiong/buck,clonetwin26/buck,SeleniumHQ/buck,darkforestzero/buck,k21/buck,SeleniumHQ/buck,justinmuller/buck,davido/buck,vschs007/buck,Addepar/buck,marcinkwiatkowski/buck,kageiit/buck,sdwilsh/buck,justinmuller/buck,sdwilsh/buck,daedric/buck,robbertvanginkel/buck,robbertvanginkel/buck,JoelMarcey/buck,zhan-xiong/buck,marcinkwiatkowski/buck,daedric/buck,romanoid/buck,romanoid/buck,zpao/buck,robbertvanginkel/buck,clonetwin26/buck,k21/buck,romanoid/buck,romanoid/buck,shs96c/buck,marcinkwiatkowski/buck,justinmuller/buck,facebook/buck,Addepar/buck,darkforestzero/buck,k21/buck,grumpyjames/buck,shybovycha/buck,robbertvanginkel/buck,grumpyjames/buck,brettwooldridge/buck,vschs007/buck,vschs007/buck,dsyang/buck,marcinkwiatkowski/buck,dsyang/buck,davido/buck,darkforestzero/buck,rmaz/buck,k21/buck,romanoid/buck,facebook/buck,zhan-xiong/buck,zhan-xiong/buck,clonetwin26/buck,SeleniumHQ/buck,darkforestzero/buck,zhan-xiong/buck,LegNeato/buck,marcinkwiatkowski/buck,shs96c/buck,shs96c/buck,daedric/buck,ilya-klyuchnikov/buck,vschs007/buck,LegNeato/buck,justinmuller/buck,ilya-klyuchnikov/buck,facebook/buck,SeleniumHQ/buck,LegNeato/buck,davido/buck,justinmuller/buck,k21/buck,rmaz/buck,Addepar/buck,dsyang/buck,k21/buck,daedric/buck,robbertvanginkel/buck,k21/buck,robbertvanginkel/buck,dsyang/buck,facebook/buck,daedric/buck,romanoid/buck,robbertvanginkel/buck,vschs007/buck,zhan-xiong/buck,grumpyjames/buck,LegNeato/buck,rmaz/buck,darkforestzero/buck,shybovycha/buck,grumpyjames/buck,shs96c/buck,vschs007/buck,sdwilsh/buck,daedric/buck,kageiit/buck,k21/buck,davido/buck,shs96c/buck,zpao/buck,romanoid/buck,shs96c/buck,davido/buck,grumpyjames/buck,ilya-klyuchnikov/buck,romanoid/buck,clonetwin26/buck,ilya-klyuchnikov/buck,clonetwin26/buck,SeleniumHQ/buck,sdwilsh/buck,marcinkwiatkowski/buck,sdwilsh/buck,marcinkwiatkowski/buck,brettwooldridge/buck,Addepar/buck,clonetwin26/buck,facebook/buck,grumpyjames/buck,shs96c/buck,Addepar/buck,rmaz/buck,JoelMarcey/buck,romanoid/buck,sdwilsh/buck,justinmuller/buck,vschs007/buck,SeleniumHQ/buck,brettwooldridge/buck,clonetwin26/buck,k21/buck,SeleniumHQ/buck,shs96c/buck,nguyentruongtho/buck,brettwooldridge/buck,zhan-xiong/buck,darkforestzero/buck,brettwooldridge/buck,brettwooldridge/buck,shs96c/buck,shs96c/buck,davido/buck,rmaz/buck,darkforestzero/buck,nguyentruongtho/buck,rmaz/buck,grumpyjames/buck,davido/buck,justinmuller/buck,sdwilsh/buck,rmaz/buck,JoelMarcey/buck,ilya-klyuchnikov/buck,JoelMarcey/buck,Addepar/buck,zpao/buck,darkforestzero/buck,JoelMarcey/buck,shs96c/buck,LegNeato/buck,robbertvanginkel/buck,darkforestzero/buck,shybovycha/buck,zpao/buck,nguyentruongtho/buck,grumpyjames/buck,shybovycha/buck,k21/buck,dsyang/buck,dsyang/buck,kageiit/buck,clonetwin26/buck,rmaz/buck,shs96c/buck,SeleniumHQ/buck,brettwooldridge/buck,SeleniumHQ/buck,daedric/buck,k21/buck,grumpyjames/buck,LegNeato/buck,grumpyjames/buck,daedric/buck,daedric/buck,SeleniumHQ/buck,ilya-klyuchnikov/buck,shybovycha/buck,rmaz/buck,davido/buck,marcinkwiatkowski/buck,darkforestzero/buck,dsyang/buck,facebook/buck,facebook/buck,davido/buck,romanoid/buck,clonetwin26/buck,brettwooldridge/buck,vschs007/buck,grumpyjames/buck,romanoid/buck,kageiit/buck,robbertvanginkel/buck,davido/buck,justinmuller/buck,justinmuller/buck,LegNeato/buck,ilya-klyuchnikov/buck,daedric/buck,zhan-xiong/buck,shybovycha/buck,vschs007/buck,zhan-xiong/buck,dsyang/buck,LegNeato/buck,ilya-klyuchnikov/buck,sdwilsh/buck,brettwooldridge/buck,robbertvanginkel/buck,JoelMarcey/buck,LegNeato/buck,LegNeato/buck,davido/buck,darkforestzero/buck,Addepar/buck,zhan-xiong/buck,JoelMarcey/buck,marcinkwiatkowski/buck,rmaz/buck,JoelMarcey/buck,ilya-klyuchnikov/buck,daedric/buck,grumpyjames/buck,clonetwin26/buck,brettwooldridge/buck,ilya-klyuchnikov/buck,nguyentruongtho/buck,kageiit/buck,kageiit/buck,marcinkwiatkowski/buck,zhan-xiong/buck,sdwilsh/buck,romanoid/buck,vschs007/buck,robbertvanginkel/buck,dsyang/buck,shybovycha/buck,brettwooldridge/buck,k21/buck,JoelMarcey/buck,zpao/buck,Addepar/buck,k21/buck,davido/buck,ilya-klyuchnikov/buck,dsyang/buck,Addepar/buck,clonetwin26/buck,davido/buck,sdwilsh/buck,rmaz/buck,marcinkwiatkowski/buck,sdwilsh/buck,JoelMarcey/buck,SeleniumHQ/buck,SeleniumHQ/buck,zpao/buck,marcinkwiatkowski/buck,LegNeato/buck,vschs007/buck,dsyang/buck,shybovycha/buck,daedric/buck,kageiit/buck,shybovycha/buck,Addepar/buck,shs96c/buck,shybovycha/buck,zhan-xiong/buck,dsyang/buck,marcinkwiatkowski/buck,romanoid/buck,daedric/buck,darkforestzero/buck,dsyang/buck,clonetwin26/buck,justinmuller/buck,shybovycha/buck,vschs007/buck,brettwooldridge/buck,Addepar/buck,LegNeato/buck,nguyentruongtho/buck,shybovycha/buck,SeleniumHQ/buck,justinmuller/buck,clonetwin26/buck,robbertvanginkel/buck,justinmuller/buck,nguyentruongtho/buck,ilya-klyuchnikov/buck,LegNeato/buck,brettwooldridge/buck,ilya-klyuchnikov/buck,Addepar/buck,zhan-xiong/buck,nguyentruongtho/buck,Addepar/buck,zpao/buck,JoelMarcey/buck,rmaz/buck