r.android.com/3005052 changed the user id of the bpfloader service to
system, which cut off its access to /dev/kmsg, resulting in its logs
silently being dropped. Give back its access to /dev/kmsg.
See //system/core/init/README.md:
file <path> <type>
Open a file path and pass its fd to the launched process. type must be "r", "w" or "rw". For native executables see libcutils android_get_control_file().
and //system/libbase/logging.cpp's OpenKmsg()
Test: boot sdk_phone64_x86_64, check logs
Change-Id: I65f00545400140983737f3ff92e2c912eebce1fd
6e8c1aa03d