Windows: Add folder to DLL search

This makes python look into the `bin` folder when searching for DLLs before
it trys C:\Windows or C:\Windows\system32 and potentially finds other versions of DLLs

Fixes #8968

win/misc/create-launcher.py

@@ -87,8 +87,13 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
     Py_FrozenFlag = 1;
     Py_Initialize();
     PySys_SetArgvEx(__argc, szArglist, 0);
-    result = PyRun_SimpleString("import sys; import os;"
+    result = PyRun_SimpleString(
+        "import sys; import os;"
         "sys.frozen=True;"
+        "from pathlib import Path;"
+        "root_path = Path(sys.executable).parents[1];"
+        "from ctypes import windll;"
+        "windll.kernel32.SetDllDirectoryW(str(root_path / 'bin'));"
         "from gajim import gajim;"
         "gajim.main();");
     Py_Finalize();