Feature request: Allow opt-in to use system provided zlib

[hmartinez82]

Today drmingw uses zlib as a git submodule. For some uses cases, like MSYS2, it would be better to use the system provided one.

An optional USE_SYSTEM_ZLIB CMake option could be introduced.

[jrfonseca]

That's reasonable.

If you want to propose a patch, you can look at https://github.com/apitrace/apitrace/blob/master/CMakeLists.txt as reference.