[misc] Add use cases for rebasing to Chromium 40
[wrt] Add 10 TCs and Update 9 TCs for wrt-packertool2-android-tests

Impacted TCs num(approved): New 10, Update 9, Delete 0
Unit test Platform: Android
Android test result summary: Pass 19, Fail 0, Block 0
[master][wrt][XWALK-3070] Add 2 new TCs

Impacted TCs num(approved):New 2,Update 0,Delete 0
Test Result: pass 2, fail 0, block 0
[wrt] Remove 11 maunal TCs due to improve to auto tests

Impacted TCs num(approved): New 0, Update 0, Delete 11
[embedding][XWALK-3238] Improve pack.py to suit higher android api level
Merge pull request #1557 from linshen/yhc-update-backendCheck-1

[master][wrt][XWALK-3070] Add 2 new TCs
Merge pull request #1555 from wanghongjuan/wrt/packertool2-add

[wrt] Add 10 TCs and Update 9 TCs for wrt-packertool2-android-tests
Merge pull request #1558 from wanghongjuan/wrt/packertoolmanu

[wrt] Remove 11 maunal TCs due to improve to auto tests
Merge pull request #1556 from yunxiaoxie/chrome40

[misc] Add use cases for rebasing to Chromium 40
Merge pull request #1559 from zhuyongyong/embeddingapi/modPack

[embedding][XWALK-3238] Improve pack.py to suit higher android api level