I've excluded lowlatency and generic search results because of the bug mentioned above in comment #4 (we know that the i386 generic kernels need to be fixed in all releases).
Mako and omap4 HWE kernels are not supported so I don't think there's anything additional to do outside of updating the i386 generic kernels in Cosmic, Bionic, and Xenial.
Adjusting the grep a little to focus on Cosmic, Bionic, and Xenial and to only match CONFIG_BINFMT_AOUT, I get this:
$ grep -rl BINFMT_AOUT=[ym] {cosmic, bionic, xenial} | grep -v -e lowlatency -e generic linux-hwe/ 4.8.0-49. 52~16.04. 1/armel- config. flavour. omap4 linux-hwe/ 4.8.0-49. 52~16.04. 1/armhf- config. flavour. omap4 linux-mako/ 3.4.0-7. 44/i386- config. flavour. virtual linux-hwe- edge/4. 10.0-20. 22~16.04. 1/armel- config. flavour. omap4
xenial/
xenial/
xenial/
xenial/
I've excluded lowlatency and generic search results because of the bug mentioned above in comment #4 (we know that the i386 generic kernels need to be fixed in all releases).
Mako and omap4 HWE kernels are not supported so I don't think there's anything additional to do outside of updating the i386 generic kernels in Cosmic, Bionic, and Xenial.