luasec: New package

LuaSec is a Lua binding for OpenSSL library to provide TLS/SSL
communication.

[Thomas: adjust header in .mk file, add missing 'mkdir -p' before
installation, remove useless quotes.]

Signed-off-by: Assaf Inbal <shmuelzon@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>