Documentation Fix for the way to run RNTester Android
Documentation Fix for the way to run RNTester Android

Summary: `installDebug` is no longer working, `installJscDebug` is the right command. ALso removed Genymotion recommendation.

Reviewed By: mdvacca

Differential Revision: D13912729

fbshipit-source-id: 1ed5eccc8460c48ee417efbd360f42783010d376

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