build: attempt to bundle files for the modules

[compnerd]

This adds a helper to bundle files into the resource directory for the module.

[compnerd]

@swift-ci please test

[jakepetroules]

What about SWBApplePlatform, SWBUniversalPlatform, and SWBCore?

[compnerd]

I wanted to get the basic files packaged up first. There was the question of whether the Specs directory needed to be preserved and I figured that we should do those in a follow up.

[owenv]

fwiw preserving the Specs/ directory structure is not important, it's just a way of organizing the sources

[owenv]

@compnerd would you mind if I picked these changes over to another PR? I've been testing them out with some local additions to begin bundling the rest of the specs and simplify the resource accessor codegen a bit.

[compnerd]

@owenv nope, by all means! Sorry, I've not been able to push this forward, been trying to finish up the static linking support to get the early swift-driver enabled on Windows.

[owenv]

No problem, thanks! it's been a good opportunity to get more familiar with the toolchain build

For reference: opened as #488