Change from ::stdout to stderr when reporting fatal error.

src/IceCompileServer.cpp

Index: src/IceCompileServer.cpp
diff --git a/src/IceCompileServer.cpp b/src/IceCompileServer.cpp
index 20be6ee6fe0489ba98ab44cc46bc224232c60c9a..49c7ab847d6c7e92dad1c0f32889a6cc712f8f0d 100644
--- a/src/IceCompileServer.cpp
+++ b/src/IceCompileServer.cpp
@@ -109,9 +109,9 @@ void reportFatalErrorThenExitSuccess(void *UserData, const std::string &Reason,
   llvm::raw_svector_ostream OS(Buffer);
   OS << "LLVM ERROR: " << Reason << "\n";
   llvm::StringRef MessageStr = OS.str();
-  ssize_t written =
-      ::fwrite(MessageStr.data(), sizeof(char), MessageStr.size(), ::stdout);
-  (void)written; // If something went wrong, we deliberately just give up.
+  ssize_t Written =
+      std::fwrite(MessageStr.data(), sizeof(char), MessageStr.size(), stderr);
+  (void)Written; // If something went wrong, we deliberately just give up.
 
   // If we reached here, we are failing ungracefully. Run the interrupt handlers
   // to make sure any special cleanups get done, in particular that we remove