[wrt] Update json and steps with Crosswalk 8 standard

Impacted tests(approved): new 0, update 171, delete 0
Unit test platform: [Android]
Unit test result summary: pass 171, fail 0, block 0
Test Environment:testkit-lite 3.1.4 ;crosswalk-8.37.194.0
Corresponding Spec(wiki):https://crosswalk-project.org/#documentation/manifest