ios: allow application/javascript and text/javascript for packager bundle mime type
ios: allow application/javascript and text/javascript for packager bundle mime type

Summary: When loading bundle from packager, "application/javascript" and "text/javascript" both refer to JS, so let's allow both for now.

Reviewed By: javache

Differential Revision: D5499446

fbshipit-source-id: f0b42e2fe5dc043a68d2c8df6a9f81e6dd995b57

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