[TargetIntegrator] Ensure the embed frameworks script is added to exi…

[Installer] Always Link the AggregateTarget as static

Even with 'use_frameworks!'.

Especially that the aggregate target's build product is weak linked.

Type is PBXBuildFile and not PBXFileReference.

Update Molinillo to 0.4

[XCConfig Helper] Add dependency target vendored libs and frameworks to build settings.

This mirrors recent changes to Core

Recursively processes dependent frameworks to ensure all vendored frameworks are added to the targets xcconfig

[Repo Command] Handle add repo mkpath exception

Don't be discriminatory, extend the scope of rescued exceptions to
StandardError.

Informative exception message was changed in production code but hadn't
been updated in the corresponding test.

Specify what the "repos" directory corresponds to.