[ffmpeg]Add divx support.

Is there a way to re-target the vcpkg to avoid this error?

Steps to reproduce:

`vcpkg install ffmpeg`

Starting package 1/1: ffmpeg:x86-windows
Building package ffmpeg[core]:x86-windows...
-- Using cached C:/Program Files/node-support/vcpkg/downloads/ffmpeg-4.1.tar.bz2
-- Using source at C:/Program Files/node-support/vcpkg/buildtrees/ffmpeg/src/ffmpeg-4-35aba462b6
CMake Error at ports/ffmpeg/portfile.cmake:22 (message):
Error: ffmpeg will not build with spaces in the path. Please use a
directory with no spaces
Call Stack (most recent call first):
scripts/ports.cmake:85 (include)

Error: Building package ffmpeg:x86-windows failed with: BUILD_FAILED
Please ensure you're using the latest portfiles with `.\vcpkg update`, then
submit an issue at https://github.com/Microsoft/vcpkg/issues including:
Package: ffmpeg:x86-windows
Vcpkg version: 2019.08.27-nohash