leda micro framework

Please accept the basic test support for leda framework (https://github.com/sergeyzavadski/leda)
- This file should be called `install.sh` instead of `instasll.sh`
- This should contain everything you put in the file `toolset/setup/linux/languages/leda.sh`. Lua is the language used, Leda is the framework (as far as I can tell).