6798898: CMS: bugs related to class unloading
Summary: Override should_remember_klasses() and remember_klass() as needed.
Reviewed-by: ysr, jcoomes
./bootstrap/bin/javac
./bootstrap/bin/javadoc
./bootstrap/bin/javah
./bootstrap/lib/doclets.jar
./bootstrap/lib/javac.jar
./bootstrap/lib/javadoc.jar
./bootstrap/lib/javah.jar
./lib/classes.jar
./lib/src.zip