fix typo in get_uec_image.sh
fix typo in get_uec_image.sh

it's precise, not percise.

Fixes bug #1085233

Change-Id: I857c233c9b461b7cc6e2ac356aa6f2cd6be93ff5

kplus/devstack-moonshot,sc68cal/devstack,neerja28/Devstack_GlusterFS,sc68cal/devstack,samgoon/devstack,sequenceiq/devstack,shootstar/devstacktest,nuxeh/devstack,affo/devstack,bigswitch/devstack,flavio-fernandes/devstack,neerja28/Devstack_GlusterFS,Mahito/devstack,upadhyay-prashant/devstack,upadhyay-prashant/devstack,bswartz/devstack,innodee/openstackk,openstack-dev/devstack,armando-migliaccio/devstack,BSJAIN92/OpenStack,mc2014/devstack,ozamiatin/devstack,olivierlemasle/devstack,Millnert/contrail-devstack,Mahito/devstack,herrsechs/devstack,rushiagr/devstack,mssumanth/devstack,vishnugonela/devstack,varunarya10/devstack,mssumanth/devstack,ozamiatin/devstack,bljgaurav/openstack-test,williamthegrey/devstack,srics/devstack,flavio-fernandes/devstack,bljgaurav/openstack-test,ewindisch/raspi-devstack,pacinete/devstack,group-policy/devstack,bq-xiao/devstack,thomasem/devstack,nawawi/openstack,parul24/devstack,prithivm/branch01,CloudServer/devstack,atulpatil301/devstack,virtualopensystems/devstack,liuquansheng47/devstack,wenhuizhang/devstack,thomasem/devstack,pacinete/devstack,CloudServer/devstack,bigswitch/devstack,citrix-openstack-build/devstack,CiscoSystems/devstack,Juniper/devstack,LoHChina/devstack,openstack-dev/devstack,costingalan/devstack,LoHChina/devstack,mmasaki/devstack,HPCHub/devstack,jamielennox/devstack,promptworks/devstack,bq-xiao/devstack,varunarya10/devstack,avvocatodemarchis/devstack,dirkmueller/devstack,parul24/devstack,richliu/devstack,Yuriy-Leonov/devstack,richliu/devstack,samgoon/devstack,vsham20/devstack,sequenceiq/devstack,pombredanne/devstack,andrewrothstein/devstack,pombredanne/devstack,deepakselvaraj/devstack,vishnugonela/devstack,promptworks/devstack,dtroyer/devstack,pczerkas/devstack,BSJAIN92/OpenStack,cloudbuilders/devstack,mmasaki/devstack,avvocatodemarchis/devstack,JioCloud/devstack,nuxeh/devstack,noironetworks/devstack,ewindisch/raspi-devstack,kplus/devstack-moonshot,eshnil2000/devstack,pczerkas/devstack,liuquansheng47/devstack,rushiagr/devstack,eharney/devstack,tianweizhang/devstack,citrix-openstack-build/devstack,noironetworks/devstack,HPCHub/devstack,dtroyer/devstack,affo/devstack,bswartz/devstack,tianweizhang/devstack,TwinkleChawla/devstack,wenhuizhang/devstack,herrsechs/devstack,prithivm/branch01,eharney/devstack,vsham20/devstack,olivierlemasle/devstack,andrewrothstein/devstack,NaokiMiyata/devstack,group-policy/devstack,atulpatil301/devstack,NaokiMiyata/devstack,costingalan/devstack,nawawi/openstack,j4/devstack,cloudbuilders/devstack,dirkmueller/devstack,TwinkleChawla/devstack,yamt/devstack,inkerra/devstack,mc2014/devstack,j4/devstack,sstrato/devstack