Hello ardneran,
Perforce specifics are not my expertise so excuse me if I’m misunderstanding what you’re asking for but I believe that you can added files such as these to the typemap through the use of the workspace related attribute “+X” in Perforce. You can find more information about how this attribute works here: http://www.perforce.com/blog/100809/selective-encryption-cloud-x-trigger.
Hope this helps!