Add code to display the contents of .debug_loclists sections which contain offset...

Add code to display the contents of .debug_loclists sections which contain offset entry tables.

	PR 28981
	* dwarf.c (fetch_indexed_value): Rename to fecth_indexed_addr and
	return the address, rather than a string.
	(fetch_indexed_value): New function - returns a value indexed by a
	DW_FORM_loclistx or DW_FORM_rnglistx form.
	(read_and_display_attr_value): Add support for DW_FORM_loclistx
	and DW_FORM_rnglistx.
	(process_debug_info): Load the loclists and rnglists sections.
	(display_loclists_list): Add support for DW_LLE_base_addressx,
	DW_LLE_startx_endx, DW_LLE_startx_length and
	DW_LLE_default_location.
	(display_offset_entry_loclists): New function.  Displays a
	.debug_loclists section that contains offset entry tables.
	(display_debug_loc): Call the new function.
	(display_debug_rnglists_list): Add support for
	DW_RLE_base_addressx, DW_RLE_startx_endx and DW_RLE_startx_length.
	(display_debug_ranges): Display the contents of the section's
	header.
	* dwarf.h (struct debug_info): Add loclists_base field.
	* testsuite/binutils-all/dw5.W: Update expected output.
	* testsuite/binutils-all/x86-64/pr26808.dump: Likewise.