Include-what-you-use api/rtc_event_log_output*

Bug: webrtc:42226242
Change-Id: Ibf28c25900776f1223dfe9685d2fc299d4da7269
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/354680
Auto-Submit: Björn Terelius <terelius@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#42491}
diff --git a/api/BUILD.gn b/api/BUILD.gn
index 283d105..c68e319 100644
--- a/api/BUILD.gn
+++ b/api/BUILD.gn
@@ -765,6 +765,7 @@
     "../rtc_base:logging",
     "../rtc_base/system:file_wrapper",
     "rtc_event_log",
+    "//third_party/abseil-cpp/absl/strings:string_view",
   ]
 }