Need #include <string.h> to use memcpy

Caused a compile failure in qtmultimedia.

Change-Id: I73652d93848c2005c0132d24bb0d269e7b450396
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@nokia.com>
Reviewed-by: João Abecasis <joao.abecasis@nokia.com>

src/corelib/global/qendian.h

@@ -46,6 +46,7 @@
 
 // include stdlib.h and hope that it defines __GLIBC__ for glibc-based systems
 #include <stdlib.h>
+#include <string.h>
 
 #ifdef __GLIBC__
 #include <byteswap.h>