Include the RuleKey when writing entries to build.log.
Include the RuleKey when writing entries to build.log.

Test Plan:
I want to start recording `build.log` on Buildbot so we can compare the
RuleKeys there with those of local builds.

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