[ORC] Move ostream operator for SymbolStringPtrBase into OrcShared.

This will allow clients outside ORC (e.g. JITLink) to use the operator without
taking a dependence on ORC.

llvm/lib/ExecutionEngine/Orc/Core.cpp

@@ -38,10 +38,6 @@ char LookupTask::ID = 0;
 RegisterDependenciesFunction NoDependenciesToRegister =
     RegisterDependenciesFunction();
 
-raw_ostream &operator<<(raw_ostream &OS, const SymbolStringPtrBase &Sym) {
-  return (OS << Sym.S->first());
-}
-
 void MaterializationUnit::anchor() {}
 
 ResourceTracker::ResourceTracker(JITDylibSP JD) {

llvm/lib/ExecutionEngine/Orc/Shared/CMakeLists.txt

@@ -5,6 +5,7 @@ add_llvm_component_library(LLVMOrcShared
   OrcError.cpp
   OrcRTBridge.cpp
   SimpleRemoteEPCUtils.cpp
+  SymbolStringPool.cpp
   ADDITIONAL_HEADER_DIRS
   ${LLVM_MAIN_INCLUDE_DIR}/llvm/ExecutionEngine/Orc
 

llvm/lib/ExecutionEngine/Orc/Shared/SymbolStringPool.cpp

@@ -0,0 +1,18 @@
+//===------- SymbolStringPool.cpp - SymbolStringPool implementation -------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ExecutionEngine/Orc/SymbolStringPool.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace llvm::orc {
+
+raw_ostream &operator<<(raw_ostream &OS, const SymbolStringPtrBase &Sym) {
+  return OS << Sym.S->first();
+}
+
+} // namespace llvm::orc