Try installing mesa from a tarball rather than git clone.
Merge branch 'master' of github.com:mapbox/mapbox-gl-native into mesa-tarball
more build concurrency
try mesa without concurrent jobs
Merge pull request #517 from mapbox/mesa-tarball

Mesa
travis: can travis cope with 2 mesa build jobs?
travis: can travis cope with 4 mesa build jobs?
Merge branch 'master' into mesa