Mark global variable as extern "C"
Mark global variable as extern "C"

Reviewed By: mnovakovic

Differential Revision: D7369214

fbshipit-source-id: 710d817b4bf74b5ca0621645dd5c005b778d7171

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