Currently when we create a recipe based on a .deb packages, we do not generate any of the post/pre install/rm functions.
Fix merged to master: http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=8b686f281c07dd473bb56b85633392457afde975
Verified in e5aa1ac23669a45491de9ecffac491c01e70203f