Only print TRAVIS_PULL_REQUEST_SHA on Travis (#20282)
Only print TRAVIS_PULL_REQUEST_SHA on Travis (#20282)


alanorozco/amphtml,ampproject/amphtml,mhc-gh/amphtml,widespace-os/amphtml,smartadserver/amphtml,laterpay/amphtml,tlong2/amphtml,Gregable/amphtml,ampproject/amphtml,mhc-gh/amphtml,voyagegroup/amphtml,honeybadgerdontcare/amphtml,prateekbh/amphtml,yandex-pcode/amphtml,zhangsu/amphtml,dotandads/amphtml,src-code/amphtml,cvializ/amphtml,taboola/amphtml,widespace-os/amphtml,rsimha-amp/amphtml,jpettitt/amphtml,tlong2/amphtml,yandex-pcode/amphtml,erwinmombay/amphtml,laterpay/amphtml,dotandads/amphtml,honeybadgerdontcare/amphtml,adup-tech/amphtml,sebastianbenz/amphtml,yandex-pcode/amphtml,zhangsu/amphtml,cvializ/amphtml,cvializ/amphtml,laterpay/amphtml,jpettitt/amphtml,danielrozenberg/amphtml,cvializ/amphtml,ampproject/amphtml,media-net/amphtml,danielrozenberg/amphtml,tlong2/amphtml,sebastianbenz/amphtml,dotandads/amphtml,honeybadgerdontcare/amphtml,prateekbh/amphtml,jpettitt/amphtml,taboola/amphtml,erwinmombay/amphtml,voyagegroup/amphtml,yandex-pcode/amphtml,nexxtv/amphtml,jridgewell/amphtml,zhouyx/amphtml,zhouyx/amphtml,Gregable/amphtml,cvializ/amphtml,jmadler/amphtml,ampproject/amphtml,Gregable/amphtml,sharethrough/amphtml,taboola/amphtml,zhangsu/amphtml,laterpay/amphtml,lannka/amphtml,mhc-gh/amphtml,yandex-pcode/amphtml,jpettitt/amphtml,sharethrough/amphtml,zhangsu/amphtml,src-code/amphtml,rsimha-amp/amphtml,mhc-gh/amphtml,Gregable/amphtml,alanorozco/amphtml,rsimha-amp/amphtml,Gregable/amphtml,src-code/amphtml,zhangsu/amphtml,mhc-gh/amphtml,erwinmombay/amphtml,nexxtv/amphtml,prateekbh/amphtml,media-net/amphtml,honeybadgerdontcare/amphtml,jmadler/amphtml,smartadserver/amphtml,adup-tech/amphtml,lannka/amphtml,media-net/amphtml,cory-work/amphtml,jpettitt/amphtml,techhtml/amphtml,jridgewell/amphtml,adup-tech/amphtml,jridgewell/amphtml,lannka/amphtml,widespace-os/amphtml,zhouyx/amphtml,lannka/amphtml,rsimha-amp/amphtml,lannka/amphtml,sharethrough/amphtml,techhtml/amphtml,widespace-os/amphtml,mhc-gh/amphtml,adup-tech/amphtml,smartadserver/amphtml,voyagegroup/amphtml,techhtml/amphtml,honeybadgerdontcare/amphtml,sharethrough/amphtml,rsimha-amp/amphtml,nexxtv/amphtml,prateekbh/amphtml,jridgewell/amphtml,Gregable/amphtml,tlong2/amphtml,jpettitt/amphtml,media-net/amphtml,sebastianbenz/amphtml,src-code/amphtml,alanorozco/amphtml,honeybadgerdontcare/amphtml,voyagegroup/amphtml,danielrozenberg/amphtml,mhc-gh/amphtml,ampproject/amphtml,techhtml/amphtml,lannka/amphtml,techhtml/amphtml,media-net/amphtml,ampproject/amphtml,voyagegroup/amphtml,Gregable/amphtml,jridgewell/amphtml,jmadler/amphtml,rsimha-amp/amphtml,src-code/amphtml,lannka/amphtml,dotandads/amphtml,prateekbh/amphtml,danielrozenberg/amphtml,tlong2/amphtml,taboola/amphtml,jpettitt/amphtml,jmadler/amphtml,jmadler/amphtml,techhtml/amphtml,widespace-os/amphtml,Gregable/amphtml,cory-work/amphtml,nexxtv/amphtml,alanorozco/amphtml,media-net/amphtml,laterpay/amphtml,adup-tech/amphtml,cory-work/amphtml,media-net/amphtml,danielrozenberg/amphtml,zhouyx/amphtml,voyagegroup/amphtml,erwinmombay/amphtml,dotandads/amphtml,smartadserver/amphtml,cory-work/amphtml,jpettitt/amphtml,smartadserver/amphtml,nexxtv/amphtml,ampproject/amphtml,sebastianbenz/amphtml,taboola/amphtml,tlong2/amphtml,cory-work/amphtml,erwinmombay/amphtml,erwinmombay/amphtml,alanorozco/amphtml,cvializ/amphtml,rsimha-amp/amphtml,src-code/amphtml,voyagegroup/amphtml,mhc-gh/amphtml,zhouyx/amphtml,danielrozenberg/amphtml,alanorozco/amphtml,zhouyx/amphtml,cory-work/amphtml,dotandads/amphtml,nexxtv/amphtml,prateekbh/amphtml,sebastianbenz/amphtml,yandex-pcode/amphtml,sebastianbenz/amphtml,taboola/amphtml,jridgewell/amphtml,sharethrough/amphtml,taboola/amphtml,danielrozenberg/amphtml,jridgewell/amphtml,ampproject/amphtml,laterpay/amphtml,widespace-os/amphtml,zhangsu/amphtml,nexxtv/amphtml,honeybadgerdontcare/amphtml,media-net/amphtml,cory-work/amphtml,sharethrough/amphtml,prateekbh/amphtml,jmadler/amphtml,alanorozco/amphtml,adup-tech/amphtml,smartadserver/amphtml,alanorozco/amphtml,zhouyx/amphtml,yandex-pcode/amphtml,danielrozenberg/amphtml