Add a little headroom to the stack when converting an exception JS -> C++
Add a little headroom to the stack when converting an exception JS -> C++

Summary:
This was causing an exception cascade leading to production
errors.  Added a test which repros the problem and passes with the
fix.

Changelog: [Internal]

Reviewed By: tmikov

Differential Revision: D20408858

fbshipit-source-id: 3fa9b8669bf3bf7617bfc05ef8f23d52bc969b4e

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