* gdb.python/py-shared.exp: New file, factored out from

	* gdb.python/py-shared.exp: New file, factored out from
	python.exp.
	* gdb.python/py-shared.c: New file.
	* gdb.python/py-shared-sl.c: New file.
	* gdb.python/python-1.c: New file.
	* gdb.python/python-sl.c: Delete.
	* gdb.python/python.c: Mention python-1.c.
	* gdb.python/python.exp: Move shared library tests to
	py-shared.exp.
	* gdb.python/Makefile.in (EXECUTABLES): Add py-shared and python.
	(MISCELLANEOUS): New.
	(clean mostlyclean): Also remove $MISCELLANEOUS.