Update makefiles for MSYS2/MinGW-w64#123

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feiyunw wants to merge 3 commits intodds-bridge:developfrom

Commits on Oct 4, 2022

Update src/Makefiles/Makefile_mingw for MSYS2/MinGW-w64.
Feiyun Wang
committed
Update test/Makefiles/Makefile_mingw for MSYS2/MinGW-w64.
Feiyun Wang
committed
Update examples/Makefiles/Makefile_mingw for MSYS2/MinGW-w64.
Feiyun Wang
committed