Switch rtc_event_log2rtp_dump to ABSL_FLAG.

Bug: webrtc:10616
Change-Id: Ic917f04565709a90440450f86cffebb03b511aae
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/144633
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28501}
diff --git a/BUILD.gn b/BUILD.gn
index 23ce0f0..c889955 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -74,7 +74,7 @@
       if (rtc_enable_protobuf) {
         deps += [
           "audio:low_bandwidth_audio_test",
-          "logging:rtc_event_log2rtp_dump",
+          "logging:rtc_event_log_rtp_dump",
         ]
       }
     }