missing build artifacts

In order to boot test kernel images in qemu, it looks like for 32b ARM for ARMv5 and ARMv6 targets, we need a dtb file to boot.

$ ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- make CC=clang -j multi_v5_defconfig

Couldn't open dtb file /home/runner/work/github_actions_playground/github_actions_playground/arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dtb

via.

$ ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- make CC=clang -j aspeed_g5_defconfig

Couldn't open dtb file /home/runner/work/github_actions_playground/github_actions_playground/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dtb

via

For PPC64le, it looks like we need Image.epapr:

$ ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu- make CC=clang -j pseries_defconfig

via Looks like just zImage was produced, but I think for qemu we need the zImage.epapr (compressed kernel image).