LuaJIT with limited support for Lua5.3

This is a fork of LuaJIT 2.1, providing limited support for Lua 5.3 features.

Key features

The following changes have been implemented:

• Added support for bitwise operators from Lua 5.3 (x64 only).
• Enabled 64-bit integer bit manipulation.
• Added metatable support for overloading bitwise operators.

Note: This implementation has not yet been thoroughly tested. Feedback and issue reports are welcome!

Credits

This work is based on the following pull request:

LuaJIT#312

Special thanks to the original contributor for his effort.