[fuzzer][Fuchsia] Forward fix for undefined StartRssThread (#155514)

The declaration was static when it shouldn't be since it can be defined
in FuzzerUtilFuchsia.cpp

GitOrigin-RevId: 316004764fe39fd1a273ebec050c749e2176b098
diff --git a/lib/fuzzer/FuzzerDriver.cpp b/lib/fuzzer/FuzzerDriver.cpp
index cd143f1..af9c260 100644
--- a/lib/fuzzer/FuzzerDriver.cpp
+++ b/lib/fuzzer/FuzzerDriver.cpp
@@ -306,7 +306,7 @@
   return HasErrors ? 1 : 0;
 }
 
-static void StartRssThread(Fuzzer *F, size_t RssLimitMb);
+void StartRssThread(Fuzzer *F, size_t RssLimitMb);
 
 // Fuchsia needs to do some book checking before starting the RssThread,
 // so it has its own implementation.
@@ -320,7 +320,7 @@
   }
 }
 
-static void StartRssThread(Fuzzer *F, size_t RssLimitMb) {
+void StartRssThread(Fuzzer *F, size_t RssLimitMb) {
   if (!RssLimitMb)
     return;
   std::thread T(RssThread, F, RssLimitMb);