[fuchsia] Migrate fx_log_init_with_config() to fx_log_reconfigure().

Bug: fuchsia:49001
Change-Id: Ib2697acea8da7e0123cee2d5c9d9d21eb427da03
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2145884
Auto-Submit: Wez <wez@chromium.org>
Commit-Queue: Kevin Marshall <kmarshall@chromium.org>
Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#761042}

base/logging.cc

@@ -446,7 +446,7 @@ bool BaseInitLoggingImpl(const LoggingSettings& settings) {
     const char* log_tag_data = log_tag.data();
     config.tags = &log_tag_data;
     config.num_tags = 1;
-    fx_log_init_with_config(&config);
+    fx_log_reconfigure(&config);
   }
 #endif