QUuid: mark as Q_PRIMITIVE_TYPE

Commit 01674860ac marked
QUuid as Q_MOVABLE_TYPE, but it's even primitive:
Every bit pattern represents a valid QUuid object (if
not a valid UUID), and memcpy() can be used to obtain
a valid, independent copy of the object.

It might not be a POD, but its close enough.

Change-Id: I0fd2d11472590688a91e9ee424732e4d5ba15df8
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Denis Dzyubenko <denis.dzyubenko@nokia.com>

src/corelib/plugin/quuid.h

@@ -200,7 +200,7 @@ public:
     uchar   data4[8];
 };
 
-Q_DECLARE_TYPEINFO(QUuid, Q_MOVABLE_TYPE);
+Q_DECLARE_TYPEINFO(QUuid, Q_PRIMITIVE_TYPE);
 
 #ifndef QT_NO_DATASTREAM
 Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QUuid &);