Adjustments to HACKING.md, bringing inline with simple-api-example.js.
Adjustments to HACKING.md, bringing inline with simple-api-example.js.

crosswalk-project/DEPRECATED-crosswalk-apk-generator,crosswalk-project/DEPRECATED-crosswalk-apk-generator,crosswalk-project/DEPRECATED-crosswalk-apk-generator,crosswalk-project/DEPRECATED-crosswalk-apk-generator