Update script/known-error-log-entries
Update script/known-error-log-entries

Add the message about using trusted certificates from a file to the
known error log entries to exclude them from the NGINX log analysis
report.

Change-Id: I3566a066bd766a94e2ee6295c3f61aeaffd0aac1

cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp,cloudendpoints/esp