Document dependency files
Document dependency files

Summary:
Gives a rough overview of how Buck uses dependency files to avoid
unnecessary rebuilds.

Test Plan: viewed docs locally

Reviewed By: Coneko

fbshipit-source-id: 6a5dd77

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