Fix bug in knowledge export
Fix bug in knowledge export

TBR=kjlubick
Bug: skia:
Change-Id: I68008bd38f08354568a3a2dfce736c7c381389a8
Reviewed-on: https://skia-review.googlesource.com/68642
Commit-Queue: Stephan Altmueller <43343ec95731c0e8daa7359daf7f2f3935582b24@google.com>
Reviewed-by: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@google.com>
Reviewed-by: Stephan Altmueller <43343ec95731c0e8daa7359daf7f2f3935582b24@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