Update gitignore

.gitignore

@@ -30,4 +30,5 @@ hooks/mysql/src/messages.o
 hooks/mysql/src/mysql_connection.d
 hooks/mysql/src/mysql_connection.o
 hooks/mysql/src/version.d
-hooks/mysql/src/version.o
+hooks/mysql/src/version.o
+hooks/mysql/core