New lvalue support in get_arg_name
New lvalue support in get_arg_name

Allow function calling get_arg_name to get the lvalue of its caller.

Change-Id: Ic081e8208162c965ca61866e2ec5a630d3e1daff
Signed-off-by: Michael Walsh <10404802c7de463f402c4a18638106ca1b12ef61@us.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation