hello_object3.cc not consistent with text in HTML

[mattsinc]

In http://learning.gem5.org/book/part2/parameters.html, we update the following DPRINTF to print the name of the parameter object:

DPRINTF(Hello, "Created the hello object with the name %s\n", myName);

However, later in the same section, hello_object3.cc does not contain this change:

DPRINTF(Hello, "Created the hello object\n");

hello_object3.cc should be updated to reflect this change. The text in parameters.rst right before hello_object3.cc is also missing this change, but I can update that as part of an upcoming pull request.

Matt