Jakob Andersen fb41fe688d Add podspec to Flutter iOS framework. (flutter/engine#3467)
* Add podspec to Flutter iOS framework.

Flutter iOS apps are already pod-enabled, so we might as well turn the
engine framework into a pod, so we don't have to manually copy the
current Flutter.framework into the app directory on every build, but
rather let Cocoapods wire things up for us.

For that to happen, we need a pod spec for Flutter.framework. This spec
will not be published, but rather downloaded as part of the engine
artifacts, and the app's Podfile will have a local path dependency on
it.

* Update licenses_golden...
2017-03-08 09:00:59 +01:00
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