Consuming static library on iOS doesn't work

it seems that after removing the lib/iOS directory we fail to consume plugins containing a static libraries. According to the doc a plugin containing a static library should have the following structure:

my-plugin/
├── ...
└── platforms/
    └── ios/
        ├── MyStaticiOSLibrary.a
        └── include/
            └── MyStaticiOSLibrary/
                └── Header1.h
                └── Header2.h
                └── ...

When processing such a plugin the CLI should add the path to MyStaticiOSLibrary.a binary to the project library search paths but it doesn't happen. As a result the build fails with:

ld: library not found for -lMyStaticiOSLibrary

Environment:

CLI, tns-core-modules, ios-runtime -> 3.0.0

Steps to reproduce:

1. Create a blank app -> tns create MyApp
2. Create a plugin with the folder structure described above
3. Add the plugin to the app -> tns plugin add my-plugin
4. Run the app: tns run ios

Start with the CLI plugin-processing path exercised by tns plugin add and tns run ios, using the documented platforms/ios layout and the static-library linker error as the reproduction. Trace how MyStaticiOSLibrary.a is handled and verify that its directory reaches the project library search paths; done means the sample app builds and runs with the plugin.