THRIFT-2221: detect C++11 and use std namespace for memory operations (smart_ptr)
Client: C++

This closes #1328
diff --git a/lib/cpp/test/concurrency/ThreadFactoryTests.h b/lib/cpp/test/concurrency/ThreadFactoryTests.h
index 4fc688c..bd6ed32 100644
--- a/lib/cpp/test/concurrency/ThreadFactoryTests.h
+++ b/lib/cpp/test/concurrency/ThreadFactoryTests.h
@@ -32,7 +32,7 @@
 namespace concurrency {
 namespace test {
 
-using boost::shared_ptr;
+using stdcxx::shared_ptr;
 using namespace apache::thrift::concurrency;
 
 /**