ARM and ARM64 support with MSVC toolchain

Added ARM/ARM64 to whole vc10 sln

Added ARM/ARM64 to zlib, libpng

Added ARM/ARM64 to srb2dd/srb2sdl

NOTE: there are issues compile an ARM version of SDL2.dll

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• 102fd11c - More work to cleanup the ARM builds

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• 0ed9665a - Added static library of SDL2 and SDL2_mixer for ARM systems

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• 7285f9ff - Netcode: handle NULL in addrinfo lookup

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All the projects' targets were changed to 10.0.16299.0

Can you re-target the solution to 8.1?

The Win32/x64 builds all work for me after I re-target.

Per Discord, it looks like all the projects need to target SDK 10.0 because of ARM, even the win32/x64 builds. SDK setting is per project, not per config.

I don't use MSVC normally so someone else should decide whether they would like to push this upgrade (@wolfy852 ?)7.

EDIT: We can also just create a separate set of sln's and project files for 2017.

There's literally nothing wrong with this merge, so I'll go ahead and merge it.

Especially since I can retarget to 8.1 on my own machine. I can also use the VC8 project files, that works too.

merged

mentioned in commit 80e30c6a