[Blue sky] port to Mason

[springmeyer]

Meta ticket to state that eventually we should consider porting these scripts to Mason (https://github.com/mapbox/mason). But not now - below is my thinking:

What Mason would offer:

• ability to easily build and install individual deps rather than building them all in one go+one tarball.
• a command line interface to install windows packages that is the same as other platforms

However, let's keep this as an idea only right now. The current approach of a single set of scripts that create a single tarball of deps is better for fast iteration and testing of build settings that impact all deps. In other words, I think its too early still to break apart all builds like mason requires. The is a The extra work of splitting each dependency into its own branch I don't think is worth it for windows because we're still fine tuning build methods, dependency relationships, and build settings (debug flags, etc).

Additionally to make a Mason port possible we'd need to:

• re-write Mason in a language that runs on windows
• or try to run Mason in gitbash on windows.

[wilhelmberg]

Agreed!