Supports cocoapods-binary

[konomae]

close #124

cocoapods-binary creates a _Prebuild directory under the Pods directory. Prebuild-enabled libraries are placed in that directory like this:

Pods
├── Target\ Support\ Files
└── _Prebuild
    └──Target\ Support\ Files // <- acknowledgements.plist for prebuild libraries are in here.

So I added a search path.

[konomae]

I think this needs keep_source_code_for_prebuilt_frameworks!. Otherwise the directory not contains acknowledgement.plist.

A directory structure without keep_source_code_for_prebuilt_frameworks!:

Pods/_Prebuild
├── GeneratedFrameworks
└── Manifest.lock

There is no Target Support Files directory.

[mono0926]

Thank you for the contribution! 👍