clat: log if SIGKILL fails

This can fail on T due to lack of:
  https://android-review.googlesource.com/c/platform/system/sepolicy/+/2522976
  allow systemserver to sigkill clat

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I277213cff8dd4f2ce7ad5356e312c291da2c93eb
1 file changed