Divehi is written right to left

QLocale::textDirection() was missing Divehi as a
right to left language.

Change-Id: Ib2395afe0e1dfbac23cb607dbf7833e6c12b2ce9
Reviewed-by: Denis Dzyubenko <denis.dzyubenko@nokia.com>

src/corelib/tools/qlocale.cpp

@@ -2148,7 +2148,8 @@ Qt::LayoutDirection QLocale::textDirection() const
         lang == QLocale::Hebrew ||
         lang == QLocale::Persian ||
         lang == QLocale::Urdu ||
-        lang == QLocale::Syriac)
+        lang == QLocale::Syriac ||
+        lang == QLocale::Divehi)
         return Qt::RightToLeft;
 
     return Qt::LeftToRight;