Revert "Rely on flame-build-scripts to grab ecsc and compare-test, even on Appveyor"
Revert "Rely on flame-build-scripts to grab ecsc and compare-test, even on Appveyor"

This reverts commit c68cd89e15e2e8114827373cd53ee90eac091bce.

jonathanvdc/cs-wasm,jonathanvdc/cs-wasm