image-burner: use log_file_path for newer libchrome.

BUG=chromium:1094927
TEST=emerge

Change-Id: I1c40d5c5cdc7b988e51d0c9895ac2e7a596535c5
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2335620
Reviewed-by: Toni Baržić <tbarzic@chromium.org>
Tested-by: Qijiang Fan <fqj@google.com>
Commit-Queue: Qijiang Fan <fqj@google.com>
diff --git a/image-burner/image_burner_main.cc b/image-burner/image_burner_main.cc
index 0dfd70a..1001505 100644
--- a/image-burner/image_burner_main.cc
+++ b/image-burner/image_burner_main.cc
@@ -17,7 +17,11 @@
 
   logging::LoggingSettings settings;
   settings.logging_dest = logging::LOG_TO_ALL;
+#if BASE_VER < 780000
   settings.log_file = "/var/log/image_burner.log";
+#else
+  settings.log_file_path = "/var/log/image_burner.log";
+#endif
   settings.lock_log = logging::LOCK_LOG_FILE;
   settings.delete_old = logging::DELETE_OLD_LOG_FILE;
   logging::InitLogging(settings);