Turn off incoming check
Turn off incoming check

This speeds up checking a significant amount as the incoming check is
pretty slow.

andyli/travis-build,akoeplinger/travis-build,craigcitro/travis-build,craigcitro/travis-build,jhass/travis-build,JuliaCI/travis-build,JuliaCI/travis-build,kevmoo/travis-build,andyli/travis-build,kevmoo/travis-build,akoeplinger/travis-build,jhass/travis-build