THRIFT-3531 Create cross lang feature test for string and container read length limit

This closes #780
diff --git a/test/crossrunner/collect.py b/test/crossrunner/collect.py
index 455189c..f92b9e2 100644
--- a/test/crossrunner/collect.py
+++ b/test/crossrunner/collect.py
@@ -44,6 +44,7 @@
   'workdir',  # work directory where command is executed
   'command',  # test command
   'extra_args',  # args appended to command after other args are appended
+  'remote_args',  # args added to the other side of the program
   'join_args',  # whether args should be passed as single concatenated string
   'env',  # additional environmental variable
 ]