It's trivial to do - and done when generating our compiled data
tables, so makes no difference to users - but makes the offset list
table simpler. Reformat the list so that the fragment-of-hour offsets
are clearly distinguished from the whole-hour ones.
Change-Id: I6e0ea23dc317542b3256e88492e4073faedef1d7
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>