[OCaml] Fix reference typemaps for std::string

Fix warnings in the extend_template_method, li_std_string, and
template_methods tests. std::string was missing a typecheck typemap.

Add extend_template_method_runme.ml, li_std_string_runme.ml, and
template_methods_runme.ml.

Add INPUT, OUTPUT and INOUT typemaps for string &

Use the INOUT typemap in the strings_test example.  In the
strings_test example, takes_and_gives_std_string() was relying on the
silly fact that an argout typemap for string & was enabled by
default.

Remove the in, out, and typecheck typemaps for string &.

Closes: #1439

0 files changed, 0 insertions, 0 deletions