Support incremental OTA in ota_extractor

Test: Run ota_extractor on an incremental OTA
Bug: 228326856

Change-Id: I8adcbb923a5ad53f35d6eddb9b29afedbc46b041
diff --git a/payload_consumer/verity_writer_android.cc b/payload_consumer/verity_writer_android.cc
index ffa2944..91efa3e 100644
--- a/payload_consumer/verity_writer_android.cc
+++ b/payload_consumer/verity_writer_android.cc
@@ -116,7 +116,8 @@
     return false;
   }
   // All hash tree data blocks has been hashed, write hash tree to disk.
-  LOG(INFO) << "Writing verity hash tree to " << partition_->target_path;
+  LOG(INFO) << "Writing verity hash tree to "
+            << partition_->readonly_target_path;
   if (hash_tree_builder_) {
     TEST_AND_RETURN_FALSE(hash_tree_builder_->BuildHashTree());
     TEST_AND_RETURN_FALSE_ERRNO(
@@ -130,7 +131,7 @@
     hash_tree_builder_.reset();
   }
   if (partition_->fec_size != 0) {
-    LOG(INFO) << "Writing verity FEC to " << partition_->target_path;
+    LOG(INFO) << "Writing verity FEC to " << partition_->readonly_target_path;
     TEST_AND_RETURN_FALSE(EncodeFEC(read_fd,
                                     write_fd,
                                     partition_->fec_data_offset,