* osdata.c (info_osdata_command): Filter out "Title" columns

	* osdata.c (info_osdata_command): Filter out "Title" columns
	from non-MI uses.
	* common/linux-osdata.c (struct osdata_type): Add title field.
	(osdata_table): Add titles to each entry.
	(linux_command_xfer_osdata): Add a column for title data.

	* gdb.texinfo (Miscellaneous GDB/MI Commands): Update -info-os
	example, add note about title column.