luabitop: import from packages

Lua BitOp is a C extension module for Lua 5.1/5.2 which adds bitwise
operations on numbers.

Signed-off-by: Maxim Storchak <m.storchak@gmail.com>
luaposix: import from packages

Signed-off-by: Maxim Storchak <m.storchak@gmail.com>
Merge pull request #8 from mstorchak/luaposix

import luabitop and luaposix from packages