Removed Borbitsoft from the AUTHORS file, added Tibor den Ouden.
Removed Borbitsoft from CONTRIBUTORS file, company section.
Moved Tibor den Ouden in CONTRIBUTORS file from company section to individual section

Change-Id: I3ab47d637d0879fde8f9dc0f714e2cb44562c897
Reviewed-on: https://chromium-review.googlesource.com/221054Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
Tested-by: Shannon Woods <shannonwoods@chromium.org>