Add missing rvalue overloads of operator+=() and operator<<()

They were forgotten when the overloads for append()/push_back() were
added in Qt 5.6

[ChangeLog][QtCore][QVarLengthArray] Added missing rvalue overload of
operator+=() and operator<<()

[ChangeLog][QtCore][QVector] Added missing rvalue overload of
operator+=() and operator<<()

Change-Id: I20fedfba2bf282773bd1f9cf2c8ec06f05896a7d
Reviewed-by: Martin Smith <martin.smith@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

src/corelib/tools/qvarlengtharray.h

@@ -175,8 +175,12 @@ public:
     void append(const T *buf, int size);
     inline QVarLengthArray<T, Prealloc> &operator<<(const T &t)
     { append(t); return *this; }
+    inline QVarLengthArray<T, Prealloc> &operator<<(T &&t)
+    { append(t); return *this; }
     inline QVarLengthArray<T, Prealloc> &operator+=(const T &t)
     { append(t); return *this; }
+    inline QVarLengthArray<T, Prealloc> &operator+=(T &&t)
+    { append(t); return *this; }
 
     void prepend(T &&t);
     void prepend(const T &t);

src/corelib/tools/qvarlengtharray.qdoc

@@ -832,6 +832,14 @@
     \sa append(), operator+=()
 */
 
+/*! \fn template<class T, int Prealloc> QVarLengthArray<T, Prealloc> &QVarLengthArray<T, Prealloc>::operator<<(T &&value)
+    \since 5.11
+
+    \overload
+
+    \sa append(), operator+=()
+*/
+
 /*! \fn template<class T, int Prealloc> QVarLengthArray<T, Prealloc> &QVarLengthArray<T, Prealloc>::operator+=(const T &value)
 
     \since 4.8
@@ -840,6 +848,14 @@
     \sa append(), operator<<()
 */
 
+/*! \fn template<class T, int Prealloc> QVarLengthArray<T, Prealloc> &QVarLengthArray<T, Prealloc>::operator+=(T &&value)
+    \since 5.11
+
+    \overload
+
+    \sa append(), operator<<()
+*/
+
 /*! \fn template<class T, int Prealloc> int QVarLengthArray<T, Prealloc>::indexOf(const T &value, int from = 0) const
 
     \since 5.3

src/corelib/tools/qvector.h

@@ -283,6 +283,10 @@ public:
     { append(t); return *this; }
     inline QVector<T> &operator<<(const QVector<T> &l)
     { *this += l; return *this; }
+    inline QVector<T> &operator+=(T &&t)
+    { append(t); return *this; }
+    inline QVector<T> &operator<<(T &&t)
+    { append(t); return *this; }
 
     QList<T> toList() const;
 

src/corelib/tools/qvector.qdoc

@@ -1162,6 +1162,14 @@
     \sa append(), operator<<()
 */
 
+/*! \fn template <typename T> void QVector<T>::operator+=(T &&value)
+    \since 5.11
+
+    \overload
+
+    \sa append(), operator<<()
+*/
+
 /*! \fn template <typename T> QVector<T> QVector<T>::operator+(const QVector<T> &other) const
 
     Returns a vector that contains all the items in this vector
@@ -1178,6 +1186,15 @@
     \sa append(), operator+=()
 */
 
+/*! \fn template <typename T> QVector<T> &QVector<T>::operator<<(T &&value)
+    \since 5.11
+
+    \overload
+
+    \sa append(), operator+=()
+*/
+
+
 /*! \fn template <typename T> QVector<T> &QVector<T>::operator<<(const QVector<T> &other)
 
     Appends \a other to the vector and returns a reference to the