cmake + vcpkg (+ android?) needs even more love

QTCREATORBUG-31883 improved quite a bit cmake + vcpkg + android experience as it works perfectly on clean builds.

But when I try to run cmake again, after first cmake run succeeded it fails big time as qtcreator will set all cmakes defines set by all these toolchains...

To make it work again, I have to remove the build folder. This works for small projects but for projects that need a lot of time to build is a PITA.

IMHO QtCreator should set only the initial defines + the ones that the user explicitly set/changed.