[OCaml] Rename example_prog.ml to runme.ml in the OCaml examples

Name the output executable "runme" in the examples.
Replace use of "foolib" in the string_from_ptr example.
Fix a warning in the std_vector example.
Add strings_test to Examples/ocaml/check.list.
Disable two tests that were causing the OCaml test suite to fail.

Examples/ocaml/string_from_ptr/Makefile

@@ -4,9 +4,9 @@ SWIG_LIB_DIR = $(TOP)/../$(TOP_BUILDDIR_TO_TOP_SRCDIR)Lib
 SWIGOPT    = -c++
 SRCS       =
 TARGET     = example
-INTERFACE  = foolib.i
-MLFILE     = foolib.ml
-PROGFILE   = example_prog.ml
+INTERFACE  = example.i
+MLFILE     = example.ml
+PROGFILE   = runme.ml
 OBJS       =
 
 check: build

Examples/ocaml/string_from_ptr/example.i

@@ -1,4 +1,4 @@
-%module foolib
+%module example
 %{
 static int foo( char **buf ) {
   *buf = "string from c";

Examples/ocaml/string_from_ptr/runme.ml

@@ -1,7 +1,5 @@
-(* foo_program.ml -- the program using foolib *)
-
 open Swig    (* Give access to the swig library *)
-open Foolib  (* This is the name of your swig output *)
+open Example (* This is the name of your swig output *)
 
 let results = _foo '()  (* Function names are prefixed with _ in order to make
 			   them lex as identifiers in ocaml.  Consider that