Update tutorial/README now that Thrift files don't support shebang


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@758453 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/tutorial/README b/tutorial/README
index 8ce6574..5e6f091 100644
--- a/tutorial/README
+++ b/tutorial/README
@@ -14,9 +14,10 @@
 
 2) Read tutorial.thrift to learn about the syntax of a Thrift file
 
-3) Run tutorial.thrift to compile the code:
+3) Compile the code for the language of your choice:
 
-     ./tutorial.thrift
+     $ thrift
+     $ thrift --gen cpp tutorial.thrift
 
 4) Take a look at the generated code.