go-tour: remove execute bit from javascript file
go-tour: remove execute bit from javascript file

TBR=campoy
R=golang-codereviews
CC=golang-codereviews
https://golang.org/cl/71870044

shuLhan/go-tour-id,shuLhan/go-tour-id,tamnd/tour,zorion/go-tour-ca,rofrol/go-tour-pl,bbandaru/tour,campoy/go-tour-ua,raindev/tour,scryner/tour,shuLhan/tour,shuLhan/tour,raindev/tour,LaPingvino/go-tour-nl,tamnd/tour,Jasperste/tour,shuLhan/go-tour-id,rofrol/go-tour-pl,tamnd/tour,zorion/go-tour-ca,scryner/tour,scryner/tour,ybin/tour,campoy/go-tour-ua,LaPingvino/go-tour-nl,dupoxy/go-tour-fr,LaPingvino/go-tour-eo,Jasperste/tour,golians/tour,Go-zh/tour,raindev/tour,bbandaru/tour,LaPingvino/go-tour-nl,golang/tour,phoorichet/tour,Jasperste/tour,golians/tour,ybin/tour,LaPingvino/go-tour-eo,rofrol/go-tour-pl,shuLhan/tour,Go-zh/tour,scryner/tour,campoy/go-tour-ua,LaPingvino/go-tour-eo,Go-zh/tour,dupoxy/go-tour-fr,Go-zh/tour,ybin/tour,phoorichet/tour,dupoxy/go-tour-fr,phoorichet/tour,golians/tour,bbandaru/tour