Add request-bug and request-default fields for DoulosSIL font.

Added the git and gerrit commit URLs for the addition of the DoulosSIL
font and it being set as the default font for Min Nan Chinese (nan). The
request-default field is commented as the font has been temporarily
disabled for nan due to performance issues.

Change-Id: I9f352921a81486e09ca6f77a841588d5663f8d3c
Merge "Add request-bug and request-default fields for DoulosSIL font."