Unbreak ubsan developer-build

Clang 3.8's undefined-behavior sanitizer checks that the
declared type of the object is a base class of the
dynamic type of the object on each access to a member
of a class type.

It therefore requires the typeinfo for these types,
which for polymorphic types is emitted in the TU where
the vtable is emitted, too.

QDBusConnectionPrivate is a polymorphic non-exported class,
so this failed at link-time. Ditto for the other case.

Fix by autotest-exporting the classes.

Also, where applicable, de-inline the dtors, so the
vtable (and typeinfo) are pinned to one TU, and the
ctor, just because it's the correct thing to do.

Change-Id: I991f81f88d2a48e85d94d9f3ac61473c0b7056d3
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/dbus/qdbusconnection_p.h

@@ -107,7 +107,7 @@ public:
 // QDBusConnectionPrivate holds the DBusConnection and
 // can have many QDBusConnection objects referring to it
 
-class QDBusConnectionPrivate: public QObject
+class Q_AUTOTEST_EXPORT QDBusConnectionPrivate: public QObject
 {
     Q_OBJECT
 public:

src/sql/models/qsqltablemodel.cpp

@@ -55,6 +55,11 @@ QT_BEGIN_NAMESPACE
 
 typedef QSqlTableModelSql Sql;
 
+QSqlTableModelPrivate::~QSqlTableModelPrivate()
+{
+
+}
+
 /*! \internal
     Populates our record with values.
 */

src/sql/models/qsqltablemodel_p.h

@@ -58,7 +58,7 @@
 
 QT_BEGIN_NAMESPACE
 
-class QSqlTableModelPrivate: public QSqlQueryModelPrivate
+class Q_AUTOTEST_EXPORT QSqlTableModelPrivate: public QSqlQueryModelPrivate
 {
     Q_DECLARE_PUBLIC(QSqlTableModel)
 
@@ -69,6 +69,8 @@ public:
           strategy(QSqlTableModel::OnRowChange),
           busyInsertingRows(false)
     {}
+    ~QSqlTableModelPrivate();
+
     void clear();
     virtual void clearCache();
     QSqlRecord record(const QVector<QVariant> &values) const;