[misc]update suite name

Impacted TCs num(approved): New 0, update 4 suite name
add test xpk to wrt-digitalsign-tizen-tests, deleted 0
Unit test platform: [tizen][android]
Pack to xpk ok
[XWALK-1106] Add use case for SpeechSynthesis

- For SpeechSynthesis feature:https://crosswalk-project.org/jira/browse/XWALK-1106
- Fail reason: XWALK-1106 is not ready

Impacted tests(approved):new 1,update 0,delete 0
Unit test platform:[Tizen IVI]
Unit test result summary:pass 0,fail 1,block 0
[usecase-webapi] Optimize extendlist
Merge pull request #981 from Honry/Honry/usecase/optimize-extendlist

[usecase-webapi] Optimize extendlist
Merge pull request #976 from linshen/shenlin/test

[misc]update suite name
Merge pull request #915 from yunxiaoxie/yunxiaoxie/speechsynthesis

 [XWALK-1106] Add use case for SpeechSynthesis