Fix msvc linking issues caused by wrong export macro

Use the correct export macro QWEBENGINEWIDGETS_EXPORT for widget API.

Change-Id: I1fe61008938522548fe84936fd97e0458ada3104
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>

src/webenginewidgets/api/qwebenginescriptcollection.h

@@ -37,7 +37,7 @@
 #ifndef QWEBENGINESCRIPTCOLLECTION_H
 #define QWEBENGINESCRIPTCOLLECTION_H
 
-#include "qtwebengineglobal.h"
+#include "qtwebenginewidgetsglobal.h"
 
 #include "qwebenginescript.h"
 #include <QtCore/QScopedPointer>
@@ -47,7 +47,7 @@
 QT_BEGIN_NAMESPACE
 class QWebEngineScriptCollectionPrivate;
 
-class Q_WEBENGINE_EXPORT QWebEngineScriptCollection {
+class QWEBENGINEWIDGETS_EXPORT QWebEngineScriptCollection {
 public:
     ~QWebEngineScriptCollection();
     bool isEmpty() const { return !count(); }

src/webenginewidgets/api/qwebenginescriptcollection_p.h

@@ -37,7 +37,7 @@
 #ifndef QWEBENGINESCRIPTCOLLECTION_P_H
 #define QWEBENGINESCRIPTCOLLECTION_P_H
 
-#include "qtwebengineglobal.h"
+#include "qtwebenginewidgetsglobal.h"
 
 #include "qwebenginescript.h"