fixed #2083: Bytecode of LuaJIT can't work on android.
cocos2dxmatoMac-mini : updating submodule reference to latest autogenerated bindings
Android also uses executeScript to load lua source file or byte code file. So unused codes need to be deleted.
Merge pull request #2454 from CocosRobot/updategeneratedsubmodule_1366896612

cocos2dxmatoMac-mini : updating submodule reference to latest autogenera...
Merge pull request #2456 from dumganhar/lua-bytecode-test

fixed #2083: Bytecode of LuaJIT can't work on android.
If file path is an empty string, return false directly in CCFileUtils::isFileExist.
Fixing a bug in CCFileUtilsIOS::isFileExist().
Merge branch 'master' of https://github.com/cocos2d/cocos2d-x into lua-bytecode-test
Merge pull request #2457 from dumganhar/master

Fixing a bug in CCFileUtilsIOS::isFileExist(). Improving performance of isFileExist for all platforms.
Merge branch 'master' of https://github.com/cocos2d/cocos2d-x

Conflicts:
	scripting/javascript/bindings/generated