misc/check-license: use git ls-files instead of find
misc/check-license: use git ls-files instead of find

ArxdSilva/tsuru,Endika/tsuru,jblancett/tsuru,ArxdSilva/tsuru,Endika/tsuru,RichardKnop/tsuru,ArxdSilva/tsuru,hugoantunes/tsuru,tuxmonteiro/tsuru,tuxmonteiro/tsuru,hcxiong/tsuru,tsuru/tsuru,cezarsa/tsuru,RichardKnop/tsuru,cezarsa/tsuru,kgrvamsi/tsuru,tsuru/tsuru,mderaldo/tsuru,firebitsbr/tsuru,kgrvamsi/tsuru,ggarnier/tsuru,ggarnier/tsuru,cgvarela/tsuru,jblancett/tsuru,firebitsbr/tsuru,jblancett/tsuru,cgvarela/tsuru,gciotta/tsuru,hcxiong/tsuru,gciotta/tsuru,tsuru/tsuru,4eek/tsuru,gwmoura/tsuru,guilhermebr/tsuru,tsuru/tsuru,hugoantunes/tsuru,guilhermebr/tsuru,hcxiong/tsuru,mderaldo/tsuru,tuxmonteiro/tsuru,cgvarela/tsuru,mderaldo/tsuru,cezarsa/tsuru,Endika/tsuru,ggarnier/tsuru,RichardKnop/tsuru,ggarnier/tsuru,4eek/tsuru,gwmoura/tsuru,guilhermebr/tsuru,guilhermebr/tsuru,firebitsbr/tsuru,cezarsa/tsuru,ArxdSilva/tsuru,kgrvamsi/tsuru,gwmoura/tsuru,gciotta/tsuru,4eek/tsuru