Infrastructure plan

[mmarchini]

Changing the meta build system means we'll need to make changes to our build infrastructure (either just installing required dependencies or rethinking how we build and test nodejs/node). This issue is intended for us to discuss what options we have and to develop a plan of action.

[richardlau]

FWIW we did put cmake on most of the CI to facilitate libuv's switch away from gyp. All of the IBM platforms, for example, should have it available.