Track shared library binaries with git LFS

[G4m4]

As it is advised to copy this template to use it, I figured it was a good idea to update the git attributes file so built binaries are handled by git LFS in users repos: this is what I needed myself.

This commit only does that as I supposed it was pretty much self-explanatory but if more is needed let me know!

[paddy-exe]

Hey, thanks for opening a PR! Is it mandatory to have git LFS installed? Would this cause any issues for users not having it installed and using the changed .gitattributes file?

[dsnopek]

I don't think we should put this in the template. These sort of files are definitely ones that some folks would use LFS for, but not everyone uses (or likes) LFS - in fact, there are folks who really dislike it. I don't think we should be making this decision for the user

[fire]

Please do not track LFS on github.

The quota of 50 gigabyte fills up in 1 day.

[G4m4]

Please notice that Github size quotas apply whether using LFS or not, just in different ways. This is only relevant to Github business model for which I have absolutely no regard.

But I do agree that we should not force a choice to the users, I am closing this PR.