Build fix for GHS Compiler 2020.1.4

Fixes error: explicit specialization of class "QTypeInfo<QRingChunk>"
must precede its first use

Change-Id: Ib60f8fc1feb97953f5b0eeed63734e81f067d9b3
Reviewed-by: Janne Koskinen <janne.p.koskinen@qt.io>
Reviewed-by: Ville Voutilainen <ville.voutilainen@qt.io>

src/corelib/tools/qringbuffer_p.h

@@ -174,6 +174,7 @@ private:
     QByteArray chunk;
     int headOffset, tailOffset;
 };
+Q_DECLARE_SHARED(QRingChunk)
 
 class QRingBuffer
 {
@@ -266,7 +267,6 @@ private:
     int basicBlockSize;
 };
 
-Q_DECLARE_SHARED(QRingChunk)
 Q_DECLARE_TYPEINFO(QRingBuffer, Q_RELOCATABLE_TYPE);
 
 QT_END_NAMESPACE