message: Add an environment variable for ASAN
diff: @@ -171,6 +171,7 @@ def doBuildInDocker(String buildType, String sanitizeMode='') {
  sanitizeFlags = '-D REALM_TSAN=ON'
  } else if (sanitizeMode.contains('address')) {
  environment << 'UNITTEST_THREADS=1'
  + environment << 'LSAN_OPTIONS=verbosity=1:log_threads=1'
  sanitizeFlags = '-D REALM_ASAN=ON'
  }
  withEnv(environment) {
  