Enable `abi_verification_mode=fail`
Enable `abi_verification_mode=fail`

Summary:
This will slow down the Buck build slightly as it needs to do both source
and class ABI generation and then diff the results, but it produces a nice
extra integration test for source ABI generation.

Test Plan: CI

Reviewed By: dreiss

fbshipit-source-id: 272c1c8

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