A user-config.jam that defined multiple python toolsets exposed

an error in the python.jam init rule.  Moved the feature
definition out of the init rule to avoid the feature redefinition
error.



[SVN r43566]

tools/build

@@ -1 +1 @@
-Subproject commit b12066613c0abb5f801355d4df155ac4803c7801
+Subproject commit b553af4b1efbb8b5de94deb722af0f2b4adbb6e6