add Win64 support

[MrCapone]

I successfully added Win64 support to my project based on cocos2d-x.
I built all .lib and .dll dependencies for Win64 target. I also added Win64 target for all Visual Studio projects ( templates and dependencies ). Set all paths for external libraries. Also i lightly modified CMakeLists.txt for Win64 support (check my gist).
I could make pull request but i don't know what changes should i push. Also i dont know how check compatibility with win32 target requirements (cocos-console and etc).

[pgw00k]

Hi,MrCapone,i also try to build cocos2dx on win64,would you upload some prebuilt *.lib files? @MrCapone

[MrCapone]

Check
https://github.com/MrCapone/cocos2d-x/tree/win64
https://github.com/MrCapone/cocos2d-x-3rd-party-libs-bin/tree/win64

[MrCapone]

But my repo was outdated so i dont have all libs. I need build and add

./Box2D/prebuilt
./bullet/prebuilt
./freetype2/prebuilt/win10
./lua/luajit/prebuilt
./openssl/include
./openssl/prebuilt
./openssl/prebuilt/win10
./spidermonkey/include
./spidermonkey/prebuilt
./sqlite3/libraries/win10
./websockets/prebuilt/win10
./win10-specific/angle/prebuilt
./win10-specific/OggDecoder/prebuilt
./win10-specific/zlib/prebuilt

[FlyingdutchmanC]

https://github.com/FlyingdutchmanC/Cocos2d-x_WIN64

This supports Windows x86, x64 and Linux in Release as well as in Debug mode.
In addition it is compatible with Visual Studio 2017 and 2019.