These include were needed to compile on Windows, MSVC 14.0 with
clang-cl.

Change-Id: I4ca5cec8314920e90fcca6fa69ec4df87d680f29
Reviewed-on: https://gerrit.libreoffice.org/23044Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>