logd: additional logging if read_offset > buffer_it->write_offset()

I didn't expect this to ever be hit, but apparently it is, so add
additional logging to track it down.

Bug: 168870781
Test: build
Change-Id: Ia472bc7458a3727e4d407365672f7394426ae515
1 file changed
tree: e979b007d0570171a8b599514d5224f012159186
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/