Allow choosing which iOS libraries to install

Not sure where to post such a “suggestion”, as these are overlooked when reported as bugs, and i’m not sure anyone is looking at the feedback site.

My issue is that iOS support takes over 5 gb. At any given point I have multiple Unity versions installed:

Version used for our project(s)
Latest available version
Latest beta version
(experimental builds)

Looking at iOS support, it includes a bunch of very large libraries.
We are only using il2cpp (also - no development builds). It could be nice to be able to select exactly which library to include during installation.

As a side note, anyone knows what are these architectures:
amd64
i386
libIphone-lib (which arch is that?)

Adding a screenshot of what’s currently installed (couldn’t add that to the original message)

2867544--210041--Screen Shot 2016-11-29 at 13.50.32.png