Fix for a duplicate macro definition

ALIGN was conflicting with a system macro,
/SDKs/MacOSX13.1.sdk/usr/include/arm/param.h.

Pick-to: 6.5
Task-number: QTBUG-109394
Change-Id: Ia460ee781f8bd1a1cdcff0371efab784c9eebb57
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

src/corelib/kernel/qmetaobjectbuilder.cpp

@@ -1026,6 +1026,9 @@ int QMetaObjectBuilder::indexOfClassInfo(const QByteArray &name)
 }
 
 // Align on a specific type boundary.
+#ifdef ALIGN
+#  undef ALIGN
+#endif
 #define ALIGN(size,type)    \
     (size) = ((size) + sizeof(type) - 1) & ~(sizeof(type) - 1)