GIT: Two different repositories with one shared folder

I am currently creating a mobile app and I use Phonegap to deploy it to different platforms. We currently have created the app for the Android Platform and the iOS Platform. The Android one has a git repository, the iOS one does not (yet).
Both app versions have a www folder which are extremely similar (only the phonegap.js and plugin files differ). I wish to create a secondary GIT repository for iOS which shares the www folder from the original repository (Android), so I don’t have to copy-paste the files every time.

Is this possible?

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