Make constant definition less awkward

Co-authored-by: Tim Düsterhus <[email protected]>

Author: derickr

Zend/zend_constants.stub.php

@@ -123,9 +123,9 @@
 
 /**
  * @var string
- * @cvalue ZEND_VM_KIND_AS_STRING
+ * @cvalue zend_vm_kind_name[ZEND_VM_KIND]
  */
-const ZEND_VM_KIND_AS_STRING = UNKNOWN;
+const ZEND_VM_KIND = UNKNOWN;
 
 /* Special constants true/false/null.  */