THRIFT-567. cpp: Can't immediately stop a TSimpleServer thread that is idle

This interrupts the server in addition to setting the stop flag.

Patch: Rush Manbert

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@991974 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/cpp/src/server/TSimpleServer.h b/lib/cpp/src/server/TSimpleServer.h
index c4fc91c..29e120e 100644
--- a/lib/cpp/src/server/TSimpleServer.h
+++ b/lib/cpp/src/server/TSimpleServer.h
@@ -58,6 +58,7 @@
 
   void stop() {
     stop_ = true;
+    serverTransport_->interrupt();
   }
 
  protected: