kernel: Ensure dtb(o) always get rebuilt
* AOSP build system is not aware of dtb(o) source update, and thus
won't rebuild the images, results in outdated artifact.
* Convert DTB(O)_OUT to make targets and make the images depend on them
to address the issue. This makes AOSP build system be aware of
their timestamp changes and re-execute recipes depending on them.
Finally, it's up to kernel's build system to decide actions to take.
Test: m dtb(o)image and observe dtb(o).img get rebuilt
Change-Id: I197e7d2d3e013ded0e555fc22bb6a1200d40df9c
1 file changed