It looks like the clean build stops before the error you reported:
https://salsa.debian.org/eighthave/android-platform-art/-/jobs/1291335
In file included from runtime/runtime.cc:53:
runtime/asm_support.h:24:10: fatal error: 'asm_defines.h' file not found
#include "asm_defines.h"
^~~~~~~~~~~~~~~
1 error generated.
make[2]: *** [debian/libart.mk:473: runtime/runtime.o] Error 1
My guess is that the Makefile dependency rules are wrong, since the
target that builds asm_defines.h works fine when manually run.
If you use your own fork, and force-push commits to your fork's master
branch, it'll run the CI jobs, which are totally clean builds each time.
