Commit
c8d439a2ccc679477165d6dc992ef4a44b23b77c
by githubSwitch to ProjectModel API in the new SwiftBuildSupport PIF builder (#8441)
### Motivation:
The goal is to adopt the new `SwiftBuild.ProjectModel` API. This new API
provides a *typesafer* and *modern* way of building PIFs
programmatically.
This continues the work I started in PR #8405, introducing now our new
PIF builder for packages.
### Modifications:
Replaces all `SwiftBuild.PIF` (aka, `SWBProjectModel.PIF`) API usage, in
`PackagePIFBuilder`, with the new `SwiftBuild.ProjectModel` API instead.
### Result:
`PackagePIFBuilder` is now modernized... but still not actually used.
This will come in my next pull request.
Tracked by rdar://147526957.