RFR(S): 8158681: ClassLoader::classloader_type() is called from code not included under #if INCLUDE_CDS

[Jiangli Zhou]

Please review the following change that fixes the openjdk only ‘minimal’ build issue:

webrev: http://cr.openjdk.java.net/~jiangli/8158681/webrev.00/
bug: https://bugs.openjdk.java.net/browse/JDK-8158681?filter=14921

The ClassLoader::classloader_type() is only defined under INCLUDE_CDS. The usage of the classloader_type() from classLoaderExt.hpp causes build failure in minimal build with openjdk only code.

Thanks,
Jiangli