Update the reference of submodule plugin-x.
for https://github.com/cocos2d/cocos2d-x/commit/93562d6aa6635ec0e0d365a15a723a35d516438a
update Cocos2dxHelper and AndroidManifest.xml template.
Merge pull request #6775 from xhcnb/native-lib

[ci skip] update Cocos2dxHelper and AndroidManifest.xml template
Merge pull request #6772 from natural-law/v3

Update the reference of submodule plugin-x.