Avoid using cached .babel-cache and .meteor from other branches.
Avoid using cached .babel-cache and .meteor from other branches.

https://github.com/meteor/meteor/pull/9826#issuecomment-382758704

cc @abernix @hwillson @jamesmillerburgess

Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor