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.cpp b/lib/cpp/src/concurrency/Mutex.cpp
index b160b67..af68db6 100644
--- a/lib/cpp/src/concurrency/Mutex.cpp
+++ b/lib/cpp/src/concurrency/Mutex.cpp
@@ -11,7 +11,7 @@
 
 using boost::shared_ptr;
 
-namespace facebook { namespace thrift { namespace concurrency {
+namespace apache { namespace thrift { namespace concurrency {
 
 /**
  * Implementation of Mutex class using POSIX mutex
@@ -145,5 +145,5 @@
 
 void ReadWriteMutex::release() const { impl_->release(); }
 
-}}} // facebook::thrift::concurrency
+}}} // apache::thrift::concurrency