Repair auto-configuration and allow this project to work with --build-dir

[SVN r37829]

example/quickstart/Jamroot

@@ -5,13 +5,17 @@
 # Specify the path to the Boost project.  If you move this project,
 # adjust the path to refer to the Boost root directory.
 use-project boost 
-  : ../../../.. ;
+  : s:/rcboost ;
 
 # Set up the project-wide requirements that everything uses the
 # boost_python library defined in the project whose global ID is
 # /boost/python.
-project
-  : requirements <library>/boost/python//boost_python ;
+project boost-python-quickstart
+  : requirements <library>/boost/python//boost_python 
+    ;
+
+# Make the definition of the python-extension rule available
+import python ;
 
 # Declare a Python extension called hello.
 python-extension extending : extending.cpp ;