integrate tbb firefox osx sandbox in build

We should make it possible to create bundles for osx that are sandboxed default, by updating the make file with additional targets.

The finalized bundle need to have the following files in the appbundle root:

sandbox/ff.sb sandbox/tor-wrapper sandbox/tor.sb Library/Vidalia/vidalia.conf Contents/MacOS/TorBrowser.app/Contents/MacOS/firefox-wrapper

Trac:
Username: trams

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