Also renamed elf_load_kspace() to load_kernel_add_on(), and friends.
The new unload_kernel_add_on() now has an image_id as parameter, no longer
a path (like the former elf_unload_kspace()).
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@7529 a95241bf-73f2-0310-859d-f6bbb57e9c96