This script do not detect if `kallsyms` is already installed or not

[Jiab77]

Hi,

I just wanted to try this script but while reading the code, I noticed the use of the kallsyms binary but no checks before use.

So this script won't work on my side and I would not being able to know why without reading the code... :sweat_smile:

I guess it's a minor fix to do.