THRIFT-270: change cpp namespaces from facebook::thrift to apache::thrift

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@739644 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/cpp/src/concurrency/Mutex.h b/lib/cpp/src/concurrency/Mutex.h
index 3b8631b..92eb0db 100644
--- a/lib/cpp/src/concurrency/Mutex.h
+++ b/lib/cpp/src/concurrency/Mutex.h
@@ -9,7 +9,7 @@
 
 #include <boost/shared_ptr.hpp>
 
-namespace facebook { namespace thrift { namespace concurrency {
+namespace apache { namespace thrift { namespace concurrency {
 
 /**
  * A simple mutex class
@@ -95,6 +95,6 @@
 #define RWGuard(m) incorrect_use_of_RWGuard(m)
 
 
-}}} // facebook::thrift::concurrency
+}}} // apache::thrift::concurrency
 
 #endif // #ifndef _THRIFT_CONCURRENCY_MUTEX_H_