Issue Description:

When sil-verify-all was disabled we were only verifying SIL at the beginning/end of the pipeline. This means that we were not verifying before we stripped ownership in the middle of the pipeline causing us to miss ownership verification failures in projects that are not directly managed by swift's cmake.

When I enabled this as part of my incremental enabling ownership onone everywhere, we found two ownership errors in Chatto/CoreStore. (I saw these locally and was preparing fixes for them, but thought they were triggered by my own local changes... turns out as the verifier shows the problem was on master).