Make sure we export the non-inline qMalloc & friends functions

If QtCore is built with Qt 5.0 API, the Q_CORE_EXPORT does not appear
anywhere and these functions wouldn't get exported, despite being
defined. So make sure that they get the Q_CORE_EXPORT attribute.

Change-Id: I0684ea1b9ad634c13dca12c97683032e44f6a290
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>

src/corelib/global/qmalloc.cpp

@@ -50,6 +50,16 @@
 
 QT_BEGIN_NAMESPACE
 
+#if !QT_DEPRECATED_SINCE(5, 0)
+// Make sure they're defined to be exportedgit
+Q_CORE_EXPORT void *qMalloc(size_t size) Q_ALLOC_SIZE(1);
+Q_CORE_EXPORT void qFree(void *ptr);
+Q_CORE_EXPORT void *qRealloc(void *ptr, size_t size) Q_ALLOC_SIZE(2);
+Q_CORE_EXPORT void *qMemCopy(void *dest, const void *src, size_t n);
+Q_CORE_EXPORT void *qMemSet(void *dest, int c, size_t n);
+#endif
+
+
 void *qMalloc(size_t size)
 {
     return ::malloc(size);