Fix some wording for the log view.
Fix some wording for the log view.

Capitalized makes more sense and it's a single log, hence
the singularization.

mjlambert/travis-web,travis-ci/travis-web,2947721120/travis-web,2947721120/travis-web,Tiger66639/travis-web,2947721120/travis-web,travis-ci/travis-web,jlrigau/travis-web,fotinakis/travis-web,fotinakis/travis-web,fauxton/travis-web,Tiger66639/travis-web,fotinakis/travis-web,Tiger66639/travis-web,Tiger66639/travis-web,travis-ci/travis-web,travis-ci/travis-web,jlrigau/travis-web,jlrigau/travis-web,mjlambert/travis-web,fauxton/travis-web,fauxton/travis-web,fotinakis/travis-web,2947721120/travis-web,jlrigau/travis-web,mjlambert/travis-web,fauxton/travis-web,mjlambert/travis-web