Add more information to `__fbBatchedBridge is undefined` error
Add more information to `__fbBatchedBridge is undefined` error

Summary:
**Motivation:**  This error can be a symptom of various other issues (see: an issue search for `__fbBatchedBridge is undefined`). I'm hoping to provide slightly more information about what might be going wrong and how to self-help.

**Test Plan:** Run some JS before the bridge has injected itself into the JS context. (sort of copping out here since the change is just to an error string literal.)
Closes https://github.com/facebook/react-native/pull/15184

Differential Revision: D5499445

Pulled By: javache

fbshipit-source-id: 8051869feb5fe5fc630516972775c134f6e41a04

hoangpham95/react-native,myntra/react-native,exponentjs/react-native,cdlewis/react-native,makadaw/react-native,exponent/react-native,farazs/react-native,hoastoolshop/react-native,farazs/react-native,myntra/react-native,cdlewis/react-native,janicduplessis/react-native,farazs/react-native,makadaw/react-native,cdlewis/react-native,cdlewis/react-native,cdlewis/react-native,myntra/react-native,janicduplessis/react-native,hoangpham95/react-native,formatlos/react-native,negativetwelve/react-native,exponent/react-native,facebook/react-native,javache/react-native,myntra/react-native,javache/react-native,dikaiosune/react-native,hoastoolshop/react-native,javache/react-native,exponent/react-native,hoastoolshop/react-native,hammerandchisel/react-native,ptmt/react-native-macos,rickbeerendonk/react-native,formatlos/react-native,negativetwelve/react-native,myntra/react-native,hoangpham95/react-native,farazs/react-native,makadaw/react-native,negativetwelve/react-native,hammerandchisel/react-native,facebook/react-native,janicduplessis/react-native,cdlewis/react-native,exponent/react-native,pandiaraj44/react-native,Bhullnatik/react-native,makadaw/react-native,kesha-antonov/react-native,negativetwelve/react-native,rickbeerendonk/react-native,hammerandchisel/react-native,Bhullnatik/react-native,jevakallio/react-native,rickbeerendonk/react-native,kesha-antonov/react-native,myntra/react-native,negativetwelve/react-native,hammerandchisel/react-native,formatlos/react-native,exponentjs/react-native,myntra/react-native,dikaiosune/react-native,Bhullnatik/react-native,Bhullnatik/react-native,negativetwelve/react-native,arthuralee/react-native,ptmt/react-native-macos,arthuralee/react-native,pandiaraj44/react-native,cdlewis/react-native,frantic/react-native,facebook/react-native,farazs/react-native,arthuralee/react-native,kesha-antonov/react-native,hammerandchisel/react-native,ptmt/react-native-macos,rickbeerendonk/react-native,janicduplessis/react-native,hammerandchisel/react-native,hoastoolshop/react-native,hoangpham95/react-native,formatlos/react-native,dikaiosune/react-native,janicduplessis/react-native,janicduplessis/react-native,exponent/react-native,makadaw/react-native,frantic/react-native,farazs/react-native,jevakallio/react-native,javache/react-native,facebook/react-native,javache/react-native,facebook/react-native,jevakallio/react-native,ptmt/react-native-macos,cdlewis/react-native,jevakallio/react-native,negativetwelve/react-native,javache/react-native,pandiaraj44/react-native,exponent/react-native,exponent/react-native,exponent/react-native,janicduplessis/react-native,pandiaraj44/react-native,farazs/react-native,ptmt/react-native-macos,hoangpham95/react-native,jevakallio/react-native,facebook/react-native,rickbeerendonk/react-native,negativetwelve/react-native,kesha-antonov/react-native,myntra/react-native,hoangpham95/react-native,cdlewis/react-native,rickbeerendonk/react-native,javache/react-native,hoastoolshop/react-native,ptmt/react-native-macos,formatlos/react-native,dikaiosune/react-native,hoangpham95/react-native,rickbeerendonk/react-native,kesha-antonov/react-native,facebook/react-native,dikaiosune/react-native,rickbeerendonk/react-native,hoastoolshop/react-native,hammerandchisel/react-native,rickbeerendonk/react-native,janicduplessis/react-native,pandiaraj44/react-native,frantic/react-native,Bhullnatik/react-native,kesha-antonov/react-native,makadaw/react-native,kesha-antonov/react-native,pandiaraj44/react-native,frantic/react-native,farazs/react-native,formatlos/react-native,hoastoolshop/react-native,kesha-antonov/react-native,ptmt/react-native-macos,Bhullnatik/react-native,facebook/react-native,pandiaraj44/react-native,formatlos/react-native,makadaw/react-native,formatlos/react-native,pandiaraj44/react-native,exponentjs/react-native,hoastoolshop/react-native,myntra/react-native,hoangpham95/react-native,exponentjs/react-native,jevakallio/react-native,jevakallio/react-native,ptmt/react-native-macos,jevakallio/react-native,exponentjs/react-native,kesha-antonov/react-native,arthuralee/react-native,negativetwelve/react-native,exponentjs/react-native,Bhullnatik/react-native,dikaiosune/react-native,Bhullnatik/react-native,javache/react-native,exponentjs/react-native,jevakallio/react-native,makadaw/react-native,arthuralee/react-native,facebook/react-native,farazs/react-native,frantic/react-native,formatlos/react-native,exponentjs/react-native,makadaw/react-native,dikaiosune/react-native,hammerandchisel/react-native,dikaiosune/react-native,javache/react-native