logd: fix bad test assumptions

SerializedLogChunk.three_logs assumes that log buffers are
zero-initialized, but they are not.  This causes test failures on
host.

Test: this test passes
Change-Id: I0dfa282bdc36eaa4e8e39d85c5227f717b45ec2a
1 file changed
tree: 8806f6ac151003b42c13afe30aaa2ef8e6959b26
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/