refactor: reorder posix.lua.in functions alphabetically.
refactor: reorder posix.lua.in functions alphabetically.

* lib/posix.lua.in: Reorder functions alphabetically.

Signed-off-by: Gary V. Vaughan <f9023000f29773649f3850298becb9544b5fd6a9@gnu.org>

ardje/luaposix,jimmyharris/luaposix,rrthomas/luaposix,rrthomas/luaposix,jimmyharris/luaposix,snegovick/luaposix,snegovick/luaposix,ardje/luaposix,zevv/luaposix,luaposix/luaposix,zevv/luaposix