Adding android build support

[gabriel-kozma]

I've added a way for compiling for Android, its a bit of a hack but it works, there are some configuration examples for the build as well

[gabriel-kozma]

@lemonmojo took me a while, but I've created the PR

[gabriel-kozma]

@nil4 I've addressed the comment

[nil4]

@gabriel-kozma thanks a lot and sorry for my delay in responding! The chmod removal looks fine to me.

[gabriel-kozma]

Hi @nil4 if everything looks good, do you plan to merge this?

[nil4]

I'm afraid this is well outside my expertise and I don't think that I can can meaningfully review it -- let's please wait until @lemonmojo has had a chance to look this over.

[lemonmojo]

@gabriel-kozma I'm sorry for the delay but I currently can't allocate the time to do a proper review of this. I did have a quick look when the PR was initially created and from what I be was able to gather I think it's missing some key components, like creating the temporary csproj for compiling the unmanaged C# output for Android. Maybe I just overlooked it but please look into that and use the Apple automatic build path as reference for that. Unfortunately I can't currently give you an ETA of when I'll be able to review this fully.