Add -Wunknown-sanitizers to standalone builds, fix dbg build
Add -Wunknown-sanitizers to standalone builds, fix dbg build

Change-Id: Icbadd35c20a68b8fafbb56f88edcb3444e9d2f73
google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto