Force stdout to flush during perftest
Force stdout to flush during perftest

Summary: This gives more feedback faster during the perftest

Test Plan: This diff

janicduplessis/buck,Learn-Android-app/buck,siddhartharay007/buck,siddhartharay007/buck,rmaz/buck,sdwilsh/buck,pwz3n0/buck,clonetwin26/buck,vschs007/buck,justinmuller/buck,pwz3n0/buck,mread/buck,justinmuller/buck,shs96c/buck,dpursehouse/buck,k21/buck,janicduplessis/buck,artiya4u/buck,luiseduardohdbackup/buck,shybovycha/buck,shs96c/buck,rowillia/buck,Addepar/buck,siddhartharay007/buck,bocon13/buck,grumpyjames/buck,Dominator008/buck,zhan-xiong/buck,dsyang/buck,neonichu/buck,1yvT0s/buck,lukw00/buck,raviagarwal7/buck,pwz3n0/buck,bocon13/buck,k21/buck,dpursehouse/buck,Heart2009/buck,SeleniumHQ/buck,rhencke/buck,MarkRunWu/buck,saleeh93/buck-cutom,rmaz/buck,mogers/buck,raviagarwal7/buck,artiya4u/buck,hgl888/buck,daedric/buck,robbertvanginkel/buck,rmaz/buck,raviagarwal7/buck,illicitonion/buck,robbertvanginkel/buck,stuhood/buck,clonetwin26/buck,zhuxiaohao/buck,janicduplessis/buck,mnuessler/buck,stuhood/buck,marcinkwiatkowski/buck,sdwilsh/buck,zpao/buck,Dominator008/buck,romanoid/buck,zhuxiaohao/buck,grumpyjames/buck,shs96c/buck,Addepar/buck,Addepar/buck,bocon13/buck,rmaz/buck,JoelMarcey/buck,neonichu/buck,Distrotech/buck,zhan-xiong/buck,vine/buck,robbertvanginkel/buck,ilya-klyuchnikov/buck,shybovycha/buck,artiya4u/buck,rmaz/buck,shybovycha/buck,stuhood/buck,mread/buck,mikekap/buck,clonetwin26/buck,zpao/buck,darkforestzero/buck,k21/buck,clonetwin26/buck,zhan-xiong/buck,dsyang/buck,JoelMarcey/buck,artiya4u/buck,darkforestzero/buck,JoelMarcey/buck,marcinkwiatkowski/buck,zhuxiaohao/buck,liuyang-li/buck,marcinkwiatkowski/buck,ilya-klyuchnikov/buck,illicitonion/buck,clonetwin26/buck,clonetwin26/buck,LegNeato/buck,darkforestzero/buck,lukw00/buck,neonichu/buck,liuyang-li/buck,vschs007/buck,vschs007/buck,darkforestzero/buck,MarkRunWu/buck,hgl888/buck,justinmuller/buck,ilya-klyuchnikov/buck,robbertvanginkel/buck,romanoid/buck,mogers/buck,ilya-klyuchnikov/buck,mogers/buck,grumpyjames/buck,bocon13/buck,SeleniumHQ/buck,Learn-Android-app/buck,lukw00/buck,rowillia/buck,davido/buck,darkforestzero/buck,facebook/buck,lukw00/buck,clonetwin26/buck,siddhartharay007/buck,SeleniumHQ/buck,shs96c/buck,dushmis/buck,mnuessler/buck,SeleniumHQ/buck,rmaz/buck,rowillia/buck,brettwooldridge/buck,LegNeato/buck,stuhood/buck,davido/buck,nguyentruongtho/buck,saleeh93/buck-cutom,Heart2009/buck,zhan-xiong/buck,Distrotech/buck,zhan-xiong/buck,tgummerer/buck,rhencke/buck,janicduplessis/buck,raviagarwal7/buck,sdwilsh/buck,neonichu/buck,neonichu/buck,Dominator008/buck,shybovycha/buck,clonetwin26/buck,rowillia/buck,marcinkwiatkowski/buck,Learn-Android-app/buck,Distrotech/buck,OkBuilds/buck,Learn-Android-app/buck,lukw00/buck,hgl888/buck,ilya-klyuchnikov/buck,MarkRunWu/buck,hgl888/buck,robbertvanginkel/buck,robbertvanginkel/buck,mnuessler/buck,dpursehouse/buck,sdwilsh/buck,neonichu/buck,mnuessler/buck,brettwooldridge/buck,Addepar/buck,grumpyjames/buck,davido/buck,darkforestzero/buck,davido/buck,saleeh93/buck-cutom,1yvT0s/buck,ilya-klyuchnikov/buck,MarkRunWu/buck,marcinkwiatkowski/buck,stuhood/buck,Dominator008/buck,siddhartharay007/buck,Heart2009/buck,OkBuilds/buck,darkforestzero/buck,lukw00/buck,grumpyjames/buck,OkBuilds/buck,luiseduardohdbackup/buck,LegNeato/buck,hgl888/buck,SeleniumHQ/buck,vine/buck,janicduplessis/buck,siddhartharay007/buck,grumpyjames/buck,grumpyjames/buck,OkBuilds/buck,raviagarwal7/buck,JoelMarcey/buck,janicduplessis/buck,Dominator008/buck,liuyang-li/buck,clonetwin26/buck,Addepar/buck,daedric/buck,zhan-xiong/buck,rowillia/buck,1yvT0s/buck,brettwooldridge/buck,romanoid/buck,Distrotech/buck,raviagarwal7/buck,brettwooldridge/buck,JoelMarcey/buck,SeleniumHQ/buck,Heart2009/buck,rhencke/buck,OkBuilds/buck,vschs007/buck,saleeh93/buck-cutom,grumpyjames/buck,janicduplessis/buck,mogers/buck,sdwilsh/buck,k21/buck,janicduplessis/buck,janicduplessis/buck,dpursehouse/buck,sdwilsh/buck,MarkRunWu/buck,k21/buck,Learn-Android-app/buck,raviagarwal7/buck,dsyang/buck,robbertvanginkel/buck,bocon13/buck,justinmuller/buck,sdwilsh/buck,LegNeato/buck,mnuessler/buck,robbertvanginkel/buck,saleeh93/buck-cutom,darkforestzero/buck,OkBuilds/buck,mikekap/buck,liuyang-li/buck,LegNeato/buck,justinmuller/buck,mread/buck,OkBuilds/buck,dushmis/buck,siddhartharay007/buck,hgl888/buck,zhuxiaohao/buck,davido/buck,brettwooldridge/buck,dushmis/buck,Dominator008/buck,shs96c/buck,SeleniumHQ/buck,nguyentruongtho/buck,marcinkwiatkowski/buck,mnuessler/buck,Distrotech/buck,darkforestzero/buck,1yvT0s/buck,vschs007/buck,rowillia/buck,rmaz/buck,davido/buck,sdwilsh/buck,brettwooldridge/buck,facebook/buck,luiseduardohdbackup/buck,luiseduardohdbackup/buck,brettwooldridge/buck,daedric/buck,kageiit/buck,zhan-xiong/buck,Addepar/buck,1yvT0s/buck,Addepar/buck,nguyentruongtho/buck,robbertvanginkel/buck,marcinkwiatkowski/buck,hgl888/buck,artiya4u/buck,romanoid/buck,facebook/buck,marcinkwiatkowski/buck,SeleniumHQ/buck,tgummerer/buck,shybovycha/buck,pwz3n0/buck,Heart2009/buck,tgummerer/buck,rmaz/buck,raviagarwal7/buck,robbertvanginkel/buck,saleeh93/buck-cutom,dsyang/buck,davido/buck,pwz3n0/buck,rowillia/buck,liuyang-li/buck,mogers/buck,stuhood/buck,luiseduardohdbackup/buck,facebook/buck,LegNeato/buck,LegNeato/buck,nguyentruongtho/buck,zpao/buck,1yvT0s/buck,Addepar/buck,vine/buck,marcinkwiatkowski/buck,grumpyjames/buck,clonetwin26/buck,shybovycha/buck,justinmuller/buck,1yvT0s/buck,lukw00/buck,mikekap/buck,Dominator008/buck,daedric/buck,dushmis/buck,davido/buck,vine/buck,mnuessler/buck,bocon13/buck,Distrotech/buck,luiseduardohdbackup/buck,rmaz/buck,zhan-xiong/buck,daedric/buck,Learn-Android-app/buck,Addepar/buck,luiseduardohdbackup/buck,mnuessler/buck,k21/buck,sdwilsh/buck,daedric/buck,mogers/buck,dsyang/buck,romanoid/buck,Heart2009/buck,k21/buck,bocon13/buck,darkforestzero/buck,illicitonion/buck,zhuxiaohao/buck,justinmuller/buck,facebook/buck,grumpyjames/buck,raviagarwal7/buck,dushmis/buck,mogers/buck,daedric/buck,vine/buck,pwz3n0/buck,bocon13/buck,romanoid/buck,davido/buck,LegNeato/buck,ilya-klyuchnikov/buck,shs96c/buck,LegNeato/buck,Addepar/buck,shybovycha/buck,liuyang-li/buck,ilya-klyuchnikov/buck,raviagarwal7/buck,Addepar/buck,liuyang-li/buck,zhuxiaohao/buck,luiseduardohdbackup/buck,illicitonion/buck,raviagarwal7/buck,OkBuilds/buck,1yvT0s/buck,illicitonion/buck,shs96c/buck,zpao/buck,grumpyjames/buck,sdwilsh/buck,robbertvanginkel/buck,Addepar/buck,shybovycha/buck,vschs007/buck,darkforestzero/buck,Dominator008/buck,rhencke/buck,mread/buck,lukw00/buck,tgummerer/buck,dsyang/buck,rhencke/buck,neonichu/buck,davido/buck,Heart2009/buck,artiya4u/buck,stuhood/buck,marcinkwiatkowski/buck,romanoid/buck,robbertvanginkel/buck,daedric/buck,JoelMarcey/buck,stuhood/buck,rowillia/buck,mikekap/buck,pwz3n0/buck,Learn-Android-app/buck,romanoid/buck,shs96c/buck,romanoid/buck,bocon13/buck,mread/buck,neonichu/buck,dpursehouse/buck,zhan-xiong/buck,vschs007/buck,mikekap/buck,zpao/buck,pwz3n0/buck,rmaz/buck,tgummerer/buck,mikekap/buck,mikekap/buck,sdwilsh/buck,stuhood/buck,brettwooldridge/buck,liuyang-li/buck,marcinkwiatkowski/buck,mikekap/buck,vschs007/buck,brettwooldridge/buck,bocon13/buck,hgl888/buck,tgummerer/buck,raviagarwal7/buck,dushmis/buck,rhencke/buck,SeleniumHQ/buck,Learn-Android-app/buck,rmaz/buck,lukw00/buck,artiya4u/buck,vschs007/buck,justinmuller/buck,clonetwin26/buck,zpao/buck,zhuxiaohao/buck,ilya-klyuchnikov/buck,Dominator008/buck,illicitonion/buck,brettwooldridge/buck,dpursehouse/buck,mikekap/buck,shybovycha/buck,vine/buck,lukw00/buck,nguyentruongtho/buck,sdwilsh/buck,romanoid/buck,shs96c/buck,vschs007/buck,OkBuilds/buck,vschs007/buck,vine/buck,robbertvanginkel/buck,1yvT0s/buck,JoelMarcey/buck,daedric/buck,artiya4u/buck,SeleniumHQ/buck,rmaz/buck,dsyang/buck,zhuxiaohao/buck,siddhartharay007/buck,MarkRunWu/buck,davido/buck,Dominator008/buck,Distrotech/buck,stuhood/buck,vine/buck,OkBuilds/buck,nguyentruongtho/buck,MarkRunWu/buck,ilya-klyuchnikov/buck,tgummerer/buck,daedric/buck,kageiit/buck,Distrotech/buck,LegNeato/buck,shybovycha/buck,JoelMarcey/buck,OkBuilds/buck,tgummerer/buck,zhan-xiong/buck,vschs007/buck,bocon13/buck,artiya4u/buck,dsyang/buck,clonetwin26/buck,rowillia/buck,illicitonion/buck,rowillia/buck,liuyang-li/buck,zhan-xiong/buck,artiya4u/buck,justinmuller/buck,JoelMarcey/buck,luiseduardohdbackup/buck,rmaz/buck,rhencke/buck,Dominator008/buck,JoelMarcey/buck,daedric/buck,rowillia/buck,stuhood/buck,SeleniumHQ/buck,facebook/buck,dsyang/buck,LegNeato/buck,Heart2009/buck,dushmis/buck,k21/buck,shs96c/buck,rhencke/buck,shybovycha/buck,ilya-klyuchnikov/buck,marcinkwiatkowski/buck,mogers/buck,neonichu/buck,dsyang/buck,siddhartharay007/buck,Distrotech/buck,tgummerer/buck,kageiit/buck,shybovycha/buck,mogers/buck,zhan-xiong/buck,zpao/buck,mogers/buck,pwz3n0/buck,vine/buck,dushmis/buck,k21/buck,illicitonion/buck,illicitonion/buck,janicduplessis/buck,JoelMarcey/buck,vine/buck,mogers/buck,facebook/buck,OkBuilds/buck,dsyang/buck,rowillia/buck,darkforestzero/buck,dsyang/buck,romanoid/buck,shs96c/buck,LegNeato/buck,k21/buck,justinmuller/buck,kageiit/buck,JoelMarcey/buck,janicduplessis/buck,mikekap/buck,davido/buck,illicitonion/buck,justinmuller/buck,sdwilsh/buck,Learn-Android-app/buck,dpursehouse/buck,illicitonion/buck,rhencke/buck,k21/buck,Learn-Android-app/buck,darkforestzero/buck,pwz3n0/buck,zhuxiaohao/buck,artiya4u/buck,zhan-xiong/buck,mikekap/buck,liuyang-li/buck,kageiit/buck,mnuessler/buck,dushmis/buck,ilya-klyuchnikov/buck,lukw00/buck,tgummerer/buck,SeleniumHQ/buck,Learn-Android-app/buck,shs96c/buck,shs96c/buck,daedric/buck,tgummerer/buck,dushmis/buck,brettwooldridge/buck,Distrotech/buck,SeleniumHQ/buck,daedric/buck,MarkRunWu/buck,Distrotech/buck,romanoid/buck,brettwooldridge/buck,pwz3n0/buck,Dominator008/buck,hgl888/buck,romanoid/buck,illicitonion/buck,JoelMarcey/buck,clonetwin26/buck,rhencke/buck,rhencke/buck,LegNeato/buck,kageiit/buck,vschs007/buck,mread/buck,mikekap/buck,Heart2009/buck,shybovycha/buck,janicduplessis/buck,OkBuilds/buck,k21/buck,vine/buck,davido/buck,Addepar/buck,ilya-klyuchnikov/buck,raviagarwal7/buck,bocon13/buck,justinmuller/buck,liuyang-li/buck,k21/buck,illicitonion/buck,dpursehouse/buck,nguyentruongtho/buck,grumpyjames/buck,justinmuller/buck,dsyang/buck,kageiit/buck,brettwooldridge/buck,marcinkwiatkowski/buck