Don't disable all sanitizers in liblog, just asan.

ASan runtime library depends on liblog, so we have to disable ASan,
but nothing else.

Bug: 33091541
Test: SANITIZE_TARGET=address keeps working
Change-Id: I6e22925b7f1d5ec86fe1bd8c00dba4c3e86ddf3f
1 file changed
tree: 5267ff036b96770f49db213cce67b7feee069dfd
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/