Updating test to reflect the latest and more verbose mysqlnd error messages, updating mysqlnd error message as well.

ext/mysqli/tests/mysqli_poll_kill.phpt

@@ -183,15 +183,16 @@ array(1) {
   %unicode|string%(1) "1"
 }
 
-Warning: mysqli_reap_async_query(): RSET_HEADER %
+Warning: mysqli_reap_async_query(): Premature end of data (mysqlnd_wireprotocol.c:%d) in %s on line %d
 
-Warning: mysqli_reap_async_query(): MySQL server has gone away in %s on line %d
-[014] 2014/%s
+Warning: mysqli_reap_async_query(): RSET_HEADER %s
 
-Warning: Error while sending QUERY packet. PID=%d in %s on line %d
+Warning: mysqli_reap_async_query(): Error reading result set's header in %s on line %d
+
+Warning: Error while sending QUERY packet. %s
 
-Warning: mysqli_reap_async_query(): MySQL server has gone away in %s on line %d
+Warning: mysqli_reap_async_query(): %s
 
 Warning: mysqli_reap_async_query(): Error reading result set's header in %s on line %d
-[018] Error: 2006/%s
-done!
+[018] Error: %d/%s
+done!

ext/mysqlnd/mysqlnd_wireprotocol.c

@@ -63,7 +63,7 @@
 
 #define BAIL_IF_NO_MORE_DATA \
 	if ((size_t)(p - begin) > packet->header.size) { \
-		php_error_docref(NULL TSRMLS_CC, E_WARNING, "At line %d", __LINE__); \
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Premature end of data (mysqlnd_wireprotocol.c:%d)", __LINE__); \
 		goto premature_end; \
 	} \