gas: Update commit 4780e5e4

Update

commit 4780e5e4
Author: Tom de Vries <tdevries@suse.de>
Date:   Fri Nov 26 09:59:45 2021 +0100

    [gas] Fix file 0 dir with -gdwarf-5

1. Replace i with j in

  for (j = 0; i < NUM_MD5_BYTES; ++j)

2. Pass -W to readelf to force CU: in output due to:

	      if (do_wide || strlen (directory) < 76)
		printf (_("CU: %s/%s:\n"), directory, file_table[0].name);
	      else
		printf ("%s:\n", file_table[0].name);

	PR gas/28629
	* dwarf2dbg.c (out_dir_and_file_list): Fix a typo in commit
	4780e5e4.
	* testsuite/gas/elf/dwarf-5-nop-for-line-table.d: Pass -W to
	readelf.