hg: jdk/jdk: 8240324: Improve is_boot_class_loader_data() by adding simple check

[harold.seigel at oracle.com]

Changeset: d8dbc734645b
Author:    hseigel
Date:      2020-03-03 15:50 +0000
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/d8dbc734645b

8240324: Improve is_boot_class_loader_data() by adding simple check
Summary: Check if cld is the null_cld before looking at the class loader oop
Reviewed-by: coleenp

! src/hotspot/share/classfile/classLoaderData.inline.hpp