[PATCH] kbuild/mkspec: Fix architectures where KBUILD_IMAGE isn't a full path

On some architectures, such as arm64, KBUILD_IMAGE is not a full path but instead just the build target. The builddeb script handles this case correctly today and will try arch/$ARCH/boot/$KBUILD_IMAGE so we can just borrow that logic and adapt it slightly for spec file syntax. Cc: Michal Marek

[PATCH] kbuild/mkspec: Fix architectures where KBUILD_IMAGE isn't a full path

On some architectures, such as arm64, KBUILD_IMAGE is not a full path but instead just the build target. The builddeb script handles this case correctly today and will try arch/$ARCH/boot/$KBUILD_IMAGE so we can just borrow that logic and adapt it slightly for spec file syntax. Cc: Michal Marek