update swig on windows

winx64/bin/swigwin-4.0.0/Examples/README

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+SWIG Examples
+
+The subdirectories of "Examples" named after SWIG's language backends
+contain a number of simple examples that are primarily used for testing.
+
+The file 'index.html' is the top of a hyperlinked document that
+contains information about all of the examples along with various
+notes related to each example.
+
+Note: All of the examples rely upon the Makefile in this directory.
+You may need to edit it to reflect the configuration of your machine
+in case the configure script guesses incorrect settings.
+
+
+*** Special note concerning C++ ***
+
+The configure script is currently unable to handle all of the possible
+options for producing dynamically loadable C++ extensions.  Here are
+the rules of thumb for making C++ work:
+
+ -  Try using the C++ as the linker for the shared library.  For example:
+
+         g++ -shared $(OBJS) -o module.so
+
+ -  If that doesn't work, you may need to explicitly link against some
+    kind of C++ runtime library.  For example:
+
+         ld -G $(OBJS) -L/opt/SUNWspro/lib -lCrun -o module.so
+
+    This can be set by modifying the setting of CPP_DLLIBS in the
+    Makefile.
+
+
+*** Special note for SWIG Maintainers ***
+
+When you add an example, consider arranging for the example to be also
+useful as part of the SWIG testing framework.  To do this, include in
+the example makefile a target "check" ("check: all" is sufficient for a
+first pass), and add an invocation to ../Makefile.in under target
+"check-examples" (or whatever is appropriate).  Later, we can add or
+expand the actions under target "check" to do more in-depth testing.