Avoid rare deadlock inside SHCreateDirectoyExW.

Replace call to SHCreateDirectoyExW on the win32 platform with multiple
calls to CreateDirectoryW to avoid deadlock within CoUninitialize which
is called from SHCreateDirectoyExW. MSDN states that calling
CoInitialize during DllMain is prohibited. SHCreateDirectoyExW
internally calls CoInitialize, thus calling SHCreateDirectoyExW inside
the DllMain is prohibited as well.