ProtocolListener test: fix build.

* I'm not sure what this is supposed to test...
Fix build of makeudfimage tests.

* The Udf namespace was removed from the headers, but not all the
implementation files
* kernel_cpp.h is not actually used
* TRACE_ERROR can't be set to dprintf when building as part of the test
(and not as a kernel add-on)

First step on the way to get jam -q unittests to work again...