update_lints.py: port another print to print() for python3 compatibility.
update_lints.py: port another print to print() for python3 compatibility.

aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust