pw_log: Include only what is used

Make the proto utils only include the pw_log_tokenized:metadata source
set to allow using these utils without including pw_log_tokenized
backend components.

Change-Id: Ide78d27aa0313337cc34b58347b02921d89ed700
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/68701
Reviewed-by: Wyatt Hepler <[email protected]>
Commit-Queue: Carlos Chinchilla <[email protected]>
diff --git a/pw_log/BUILD.gn b/pw_log/BUILD.gn
index 3da0d99..89b68b9 100644
--- a/pw_log/BUILD.gn
+++ b/pw_log/BUILD.gn
@@ -45,7 +45,7 @@
   public_deps = [
     ":pw_log.facade",
     "$dir_pw_bytes",
-    "$dir_pw_log_tokenized",
+    "$dir_pw_log_tokenized:metadata",
     "$dir_pw_result",
   ]
   deps = [ "$dir_pw_log:protos.pwpb" ]