Merge pull request #4048 from dumganhar/develop

[Bindings] Skip Label::getLettersInfo
Update before-install.sh
[AUTO] : updating submodule reference to latest autogenerated bindings
Merge pull request #4049 from CocosRobot/updategeneratedsubmodule_1383291729

[AUTO] : updating submodule reference to latest autogenerated bindings
fix assetsmansger path
build release version of android samples
Merge pull request #4053 from minggo/iss2905-adjust_folder

[ci skip]Iss2905 adjust folder
Don't set debug flag in AndroidManifest.xml.