[autoroll] Add some logging to config-converter
[autoroll] Add some logging to config-converter

One of the rollers isn't getting updated, and I'm not sure why.

Change-Id: I4d03ed8944939b22b8f22252377c4b20759e7e03
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/558646
Commit-Queue: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@google.com>
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Auto-Submit: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@google.com>
Commit-Queue: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot