Updates Yoga to handle being in a Xcode framework project
Updates Yoga to handle being in a Xcode framework project

Summary:
Updates the Yoga Podspec to work with Cocoa frameworks. Replicated a2's work over on Yoga https://github.com/facebook/yoga/pull/726

(Which should also get merged too please ❤️ )

Set it manually in my own project and tested 👍

Only https://github.com/facebook/yoga/pull/726

[IOS] [BUGFIX] [Yoga] - Fixes to yoga.podspec when integrating into an iOS app using Cocoa frameworks.
Closes https://github.com/facebook/react-native/pull/18492

Differential Revision: D7355907

Pulled By: hramos

fbshipit-source-id: 6986d2bc560a23bb7f0f20b80e88bb440079891a

hammerandchisel/react-native,myntra/react-native,pandiaraj44/react-native,javache/react-native,janicduplessis/react-native,myntra/react-native,facebook/react-native,facebook/react-native,javache/react-native,exponentjs/react-native,hammerandchisel/react-native,exponentjs/react-native,javache/react-native,hoangpham95/react-native,myntra/react-native,facebook/react-native,janicduplessis/react-native,hammerandchisel/react-native,janicduplessis/react-native,pandiaraj44/react-native,exponentjs/react-native,myntra/react-native,hoangpham95/react-native,hoangpham95/react-native,hammerandchisel/react-native,javache/react-native,pandiaraj44/react-native,javache/react-native,myntra/react-native,exponent/react-native,hoangpham95/react-native,myntra/react-native,hoangpham95/react-native,arthuralee/react-native,myntra/react-native,exponent/react-native,exponent/react-native,exponent/react-native,janicduplessis/react-native,javache/react-native,myntra/react-native,facebook/react-native,exponentjs/react-native,janicduplessis/react-native,exponent/react-native,hoangpham95/react-native,pandiaraj44/react-native,hammerandchisel/react-native,janicduplessis/react-native,hammerandchisel/react-native,javache/react-native,facebook/react-native,pandiaraj44/react-native,facebook/react-native,pandiaraj44/react-native,hoangpham95/react-native,exponent/react-native,facebook/react-native,exponentjs/react-native,facebook/react-native,exponentjs/react-native,myntra/react-native,hammerandchisel/react-native,exponentjs/react-native,exponent/react-native,javache/react-native,arthuralee/react-native,hoangpham95/react-native,facebook/react-native,arthuralee/react-native,arthuralee/react-native,pandiaraj44/react-native,arthuralee/react-native,hammerandchisel/react-native,exponent/react-native,janicduplessis/react-native,javache/react-native,pandiaraj44/react-native,exponentjs/react-native,janicduplessis/react-native