It explicitly excludes having a two-digit special case like 'yy'.
Correct that in qlocale_mac.mm, add support in dateconverter.py
No current locale actually uses the 'u' format, so this makes no
change to data.
Change-Id: I16dfed2d3a7d2054b4b86f9a246bff297df9fc0a
Reviewed-by: Dennis Oberst <dennis.oberst@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>