Mark QTzType as Q_PRIMITIVE_TYPE.

sizeof(QTzType) == sizeof(void*) on my platform, so it will benefit
from the type info classification.

Change-Id: I07146372da4381dba72da3718bc9c0b76a22b4fb
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>

src/corelib/tools/qtimezoneprivate_tz.cpp

@@ -134,6 +134,8 @@ struct QTzType {
     bool   tz_ttisgmt; // Is in UTC time
     bool   tz_ttisstd; // Is in Standard time
 };
+Q_DECLARE_TYPEINFO(QTzType, Q_PRIMITIVE_TYPE);
+
 
 // TZ File parsing