OSX: remove Ghost carbon files and adapt scons

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@61127 954f8c5b-7b00-dc11-b283-0030488c597c
OSX: remove Ghost carbon files finally

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@61128 954f8c5b-7b00-dc11-b283-0030488c597c