All postinstalls should be able to run at do_rootfs time.
http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=36a64307274c5940332ceb139d2b4eff33663e29 http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=950704e392b7888aa6a49fd4273c2eca8b9b6c1e http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=fb7ea95fc367728f4fcfb0da4f5779e3d19df1bc http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=173a61826305838ba56a9da50491e657b4843f56 http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=71537bb721b64968f1a3ccaef9a5490290df8b51 http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=fbfaefb7e927e16a607f602db6e17a85dfba5433
Verified on master branch. Commit ID: 9ffee9add2d0380f4025e7a678a166f25a7d659e