Improve error message for duplicate classes
Improve error message for duplicate classes

Summary:
Non-split-dex apps will fail to build if duplicate classes are included.
This tracks the jars that each class came from so we can report the
sources of duplicate classes.

Test Plan: Saw the error.  Was informed.

Reviewed By: asp2insp

fbshipit-source-id: c965598

shs96c/buck,romanoid/buck,marcinkwiatkowski/buck,ilya-klyuchnikov/buck,dsyang/buck,zpao/buck,zpao/buck,nguyentruongtho/buck,ilya-klyuchnikov/buck,marcinkwiatkowski/buck,shybovycha/buck,kageiit/buck,JoelMarcey/buck,facebook/buck,shs96c/buck,shs96c/buck,brettwooldridge/buck,clonetwin26/buck,JoelMarcey/buck,clonetwin26/buck,LegNeato/buck,Addepar/buck,LegNeato/buck,shs96c/buck,SeleniumHQ/buck,marcinkwiatkowski/buck,LegNeato/buck,romanoid/buck,Addepar/buck,marcinkwiatkowski/buck,ilya-klyuchnikov/buck,LegNeato/buck,k21/buck,clonetwin26/buck,k21/buck,ilya-klyuchnikov/buck,k21/buck,clonetwin26/buck,rmaz/buck,k21/buck,brettwooldridge/buck,robbertvanginkel/buck,brettwooldridge/buck,rmaz/buck,facebook/buck,facebook/buck,k21/buck,JoelMarcey/buck,romanoid/buck,dsyang/buck,zhan-xiong/buck,shybovycha/buck,k21/buck,Addepar/buck,clonetwin26/buck,k21/buck,marcinkwiatkowski/buck,ilya-klyuchnikov/buck,dsyang/buck,zhan-xiong/buck,marcinkwiatkowski/buck,k21/buck,JoelMarcey/buck,rmaz/buck,dsyang/buck,shybovycha/buck,brettwooldridge/buck,dsyang/buck,JoelMarcey/buck,LegNeato/buck,zhan-xiong/buck,robbertvanginkel/buck,JoelMarcey/buck,kageiit/buck,zpao/buck,rmaz/buck,romanoid/buck,k21/buck,SeleniumHQ/buck,nguyentruongtho/buck,rmaz/buck,SeleniumHQ/buck,shybovycha/buck,dsyang/buck,JoelMarcey/buck,robbertvanginkel/buck,zhan-xiong/buck,rmaz/buck,shs96c/buck,kageiit/buck,zpao/buck,brettwooldridge/buck,clonetwin26/buck,romanoid/buck,shybovycha/buck,zhan-xiong/buck,shs96c/buck,nguyentruongtho/buck,dsyang/buck,k21/buck,ilya-klyuchnikov/buck,nguyentruongtho/buck,Addepar/buck,romanoid/buck,zhan-xiong/buck,brettwooldridge/buck,shybovycha/buck,rmaz/buck,ilya-klyuchnikov/buck,shybovycha/buck,romanoid/buck,SeleniumHQ/buck,brettwooldridge/buck,marcinkwiatkowski/buck,marcinkwiatkowski/buck,LegNeato/buck,zhan-xiong/buck,Addepar/buck,Addepar/buck,SeleniumHQ/buck,brettwooldridge/buck,nguyentruongtho/buck,clonetwin26/buck,shs96c/buck,rmaz/buck,shybovycha/buck,SeleniumHQ/buck,shybovycha/buck,facebook/buck,facebook/buck,SeleniumHQ/buck,JoelMarcey/buck,zhan-xiong/buck,k21/buck,facebook/buck,k21/buck,nguyentruongtho/buck,romanoid/buck,robbertvanginkel/buck,brettwooldridge/buck,marcinkwiatkowski/buck,dsyang/buck,rmaz/buck,rmaz/buck,shs96c/buck,dsyang/buck,clonetwin26/buck,marcinkwiatkowski/buck,romanoid/buck,JoelMarcey/buck,marcinkwiatkowski/buck,SeleniumHQ/buck,romanoid/buck,kageiit/buck,romanoid/buck,Addepar/buck,rmaz/buck,facebook/buck,romanoid/buck,robbertvanginkel/buck,Addepar/buck,Addepar/buck,zhan-xiong/buck,dsyang/buck,Addepar/buck,shybovycha/buck,SeleniumHQ/buck,ilya-klyuchnikov/buck,k21/buck,SeleniumHQ/buck,romanoid/buck,ilya-klyuchnikov/buck,SeleniumHQ/buck,robbertvanginkel/buck,clonetwin26/buck,SeleniumHQ/buck,shybovycha/buck,clonetwin26/buck,dsyang/buck,dsyang/buck,marcinkwiatkowski/buck,Addepar/buck,LegNeato/buck,rmaz/buck,shybovycha/buck,ilya-klyuchnikov/buck,brettwooldridge/buck,shybovycha/buck,JoelMarcey/buck,LegNeato/buck,zhan-xiong/buck,zpao/buck,LegNeato/buck,kageiit/buck,clonetwin26/buck,zpao/buck,ilya-klyuchnikov/buck,robbertvanginkel/buck,JoelMarcey/buck,shs96c/buck,robbertvanginkel/buck,brettwooldridge/buck,shs96c/buck,robbertvanginkel/buck,shs96c/buck,Addepar/buck,rmaz/buck,robbertvanginkel/buck,kageiit/buck,dsyang/buck,ilya-klyuchnikov/buck,LegNeato/buck,robbertvanginkel/buck,shs96c/buck,LegNeato/buck,LegNeato/buck,robbertvanginkel/buck,nguyentruongtho/buck,zhan-xiong/buck,brettwooldridge/buck,kageiit/buck,clonetwin26/buck,shs96c/buck,marcinkwiatkowski/buck,ilya-klyuchnikov/buck,LegNeato/buck,zhan-xiong/buck,JoelMarcey/buck,robbertvanginkel/buck,brettwooldridge/buck,clonetwin26/buck,SeleniumHQ/buck,Addepar/buck,zpao/buck,zhan-xiong/buck,JoelMarcey/buck