This was omitted from c3879a7b4c which modified the other msvc .bat
files.

Per request from Juan José Santamaría Flecha

Discussion: https://postgr.es/m/CAC+AXB0_fxYGbQoaYjCA8um7TTbOVP4L9aXnVmHwK8WzaT4gdA@mail.gmail.com

Backpatch to all live branches.