.rsrc support was missing

In the previous Makefile support for the .rsrc file was missing, because I didn't see it.
As I was told in https://bitbucket.org/haikuports/haikuports/pull-request/30/created-recipe-for-capitalbe/diff I made a .rdef out of the .rsrc and removed it properly.

One thing bugging me is that the helpfiles directory are to be in the same folder as the binary to be used. Actually, I am not sure how I could move them there with the makefile-engine and I don't know if this is required or not.