Added PHP_SYS_SIZE

Author: marc-mabe

main/main.stub.php

@@ -163,6 +163,11 @@
  * @cvalue SIZEOF_ZEND_LONG
  */
 const PHP_INT_SIZE = UNKNOWN;
+/**
+ * @var int
+ * @cvalue SIZEOF_SIZE_T
+ */
+const PHP_SYS_SIZE = UNKNOWN;
 /**
  * @var int
  * @cvalue FD_SETSIZE