Fix the display of the idnex values for DW_FORM_loclistx and DW_FORM_rnglistx.  Correct the display of .debug.loclists sections.

	PR 29267
	* dwarf.c (display_debug_rnglists): New function, broken out of..
	(display_debug_ranges): ... here.
	(read_and_display_attr_value): Correct calculation of index
	displayed for DW_FORM_loclistx and DW_FORM_rnglistx.
	* testsuite/binutils-all/x86-64/pr26808.dump: Update expected
	output.