liblsl don't build correctly on MSYS2 (Windows)

[cslr]

LibLSL don't build correctly on MSYS2/MinGW.

Attached patch makes it possible to compile liblsl on MSYS2 (Windows).

liblsl.diff.patch

[cslr]

liblsl.diff.patch:

Common subdirectories: original/liblsl/.git and liblsl/.git
Common subdirectories: original/liblsl/.github and liblsl/.github
diff original/liblsl/CMakeLists.txt liblsl/CMakeLists.txt
220a221

target_link_libraries(lslobj PRIVATE iphlpapi winmm mswsock ws2_32)
Only in liblsl/: build
Common subdirectories: original/liblsl/cmake and liblsl/cmake
Common subdirectories: original/liblsl/conda and liblsl/conda
Common subdirectories: original/liblsl/docs and liblsl/docs
Common subdirectories: original/liblsl/examples and liblsl/examples
Common subdirectories: original/liblsl/include and liblsl/include
Common subdirectories: original/liblsl/lslboost and liblsl/lslboost
Common subdirectories: original/liblsl/project and liblsl/project
Common subdirectories: original/liblsl/src and liblsl/src
Common subdirectories: original/liblsl/testing and liblsl/testing
Common subdirectories: original/liblsl/thirdparty and liblsl/thirdparty