gdb

gdb
	PR python/10808:
	* python/python.c (execute_gdb_command): Add keywords.  Accept
	"to_string" argument.
	(struct restore_ui_file_closure): New.
	(restore_ui_file): New function.
	(make_cleanup_restore_ui_file): Likewise.
	(GdbMethods) <execute>: Update.
gdb/doc
	PR python/10808:
	* gdb.texinfo (Basic Python): Document new gdb.execute argument.
gdb/testsuite
	PR python/10808:
	* gdb.python/python.exp: Add new tests.