New python module gdb.types.

	New python module gdb.types.
	* NEWS: Document it.
	* data-directory/Makefile.in (PYTHON_FILES): Add gdb/types.py.
	* python/lib/gdb/types.py: New file.

	testsuite/
	* lib/gdb-python.exp (gdb_check_python_config): New function.
	* gdb.python/Makefile.in (EXECUTABLES): Add lib-types.
	* gdb.python/lib-types.cc: New file.
	* gdb.python/lib-types.exp: New file.

	doc/
	* gdb.texinfo (Python): Add "Python modules".
	(Types in Python): Add reference to gdb.types section.
	(Python modules): New node.