dlib: update to 19.24.8

mingw-w64-dlib/001-python-binding.patch

@@ -1,11 +1,11 @@
 --- a/dlib/external/pybind11/tools/FindPythonLibsNew.cmake
 +++ b/dlib/external/pybind11/tools/FindPythonLibsNew.cmake
-@@ -204,7 +204,7 @@
- string(REGEX REPLACE "\\\\" "/" PYTHON_INCLUDE_DIR "${PYTHON_INCLUDE_DIR}")
- string(REGEX REPLACE "\\\\" "/" PYTHON_SITE_PACKAGES "${PYTHON_SITE_PACKAGES}")
+@@ -233,7 +233,7 @@
  
--if(CMAKE_HOST_WIN32)
-+if(CMAKE_HOST_WIN32 AND NOT MINGW)
+ if(DEFINED PYTHON_LIBRARY)
+   # Don't write to PYTHON_LIBRARY if it's already set
+-elseif(CMAKE_HOST_WIN32)
++elseif(CMAKE_HOST_WIN32 AND NOT MINGW)
    set(PYTHON_LIBRARY "${PYTHON_PREFIX}/libs/python${PYTHON_LIBRARY_SUFFIX}.lib")
  
    # when run in a venv, PYTHON_PREFIX points to it. But the libraries remain in the