Bug 1385539 - Re-add accidentally deleted documentation of mozbuild.configure.ConfigureSandbox.include_file; r=glandium

The code was deleted in Bug 1256571.

MozReview-Commit-ID: JgWoxOyMQ8z

--HG--
extra : rebase_source : 5f37e281096b946e94dd77182c8704beee8eeecf

python/mozbuild/mozbuild/configure/__init__.py

@@ -361,6 +361,7 @@ class ConfigureSandbox(dict):
 
     def include_file(self, path):
         '''Include one file in the sandbox. Users of this class probably want
+        to use `run` instead.
 
         Note: this will execute all template invocations, as well as @depends
         functions that depend on '--help', but nothing else.