libutils: ~RefBase more logs

This code was a bit confusing because Android runs with an old debug
mode on. The flag around this is removed to make it more clear what
is going on, and the log is promoted D -> W.

Bug: N/A
Test: boot, check logs
Change-Id: I4645b1a7b8e252336a6f9482ce6b57e1b907619d
1 file changed