Make ScriptingCore.cpp compile with C++11 on iOS

When compiling with clang -stdlib=libc++ -std=c++11, write, read, and close functions are part of the unistd.h header file.
Merge pull request #1993 from dumganhar/master

fixed #1726: JSB application crashs on android device with armv6 architecture
Merge pull request #1991 from SevInf/patch-1

fixed #1729: Making ScriptingCore.cpp compiled fine with C++11 on iOS
Update AUTHORS
fixed #1724: Renamed libhellojavascript to libcocos2djs.
Merge branch 'master' of https://github.com/cocos2d/cocos2d-x into iss1724-hellojs
Merge pull request #1994 from dumganhar/iss1724-hellojs

fixed #1724: Renamed libhellojavascript to libcocos2djs.
Updated the submodule of cxx-generator.