Update xwalk command in desc

 -open_app to app_launcher -s
 -ail_list to app_launcher -l
[webapi] Change designed tests to approved for XmlHttpRequest

Impacted tests(approved): new 10, update 0, delete 0
Unit test platform: [Android]
Unit test result summary: pass 2, fail 8, block 0
Merge pull request #1234 from yunxiaoxie/status-xmlhttprequest

[webapi] Change designed tests to approved for XmlHttpRequest
[webapi] Change designed test to approved for IndexedDB

Impacted tests(approved): new 1, update 0, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 0, fail 1, block 0
Merge pull request #1235 from yunxiaoxie/status-indexeddb

[webapi] Change designed test to approved for IndexedDB
Merge pull request #1232 from Honry/update-command-in-desc

Update xwalk command in desc