Race Condition in JS travis-CI build

[reiner-dolp]

See build log here. Should either clone later or pull before push.

To github.com:liblouis/js-build.git
 ! [rejected]        master -> master (fetch first)
error: failed to push some refs to '[email protected]:liblouis/js-build.git'
hint: Updates were rejected because the remote contains work that you do
hint: not have locally. This is usually caused by another repository pushing
hint: to the same ref. You may want to first integrate the remote changes
hint: (e.g., 'git pull ...') before pushing again.