af6be26 Add lots of logging to component-reuse logic.

Authored and Committed by ralph 6 years ago
    Add lots of logging to component-reuse logic.
    
    We had a build today that did not re-use its components when we expected
    it to.  I looked at the logs, but didn't have any information to help
    figure out why this happened.
    
    These log statements should help for the next time.
    
        
file modified
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