Add makepkg for archlinux package generation

I tend to use my Mac to create or update archlinux packages.   Like `dpkg` the program won't allow you to install any packages.

```
The following options won't work:

-i, --install    Install package after successful build
-r, --rmdeps     Remove installed dependencies after a successful build
-s, --syncdeps   Install missing dependencies with pacman
--asdeps         Install packages as non-explicitly installed

Maybe others I haven't tested all the options

NOTE: I usually don't use this function but if you want to create a binary package, make sure to pass the -d option.
```
yes, system bash is too old.  I get this error without new bash: `configure: error: *** bash >= 4.1.0 is required for pacman scripts`