Commit: Add support for displaying unicode characters

[Nick Clifton]

Hi Guys,

  I am applying the attached patch to add the ability to display unicode
  characters to the nm, strings, objdump and readelf tools.  This is
  part of a response to the Trojan Source vulnerability that was
  recently disclosed.  I am also working on a separate patch for gas,
  but that is not quite ready yet.

Cheers
  Nick

binutils/ChangeLog
2021-11-09  Nick Clifton  <nickc@redhat.com>

	* nm.c: Add --unicode option to control how unicode characters are
	handled.
	* objdump.c: Likewise.
	* readelf.c: Likewise.
	* strings.c: Likewise.
	* binutils.texi: Document the new feature.
	* NEWS: Document the new feature.
	* testsuite/binutils-all/unicode.exp: New file.
	* testsuite/binutils-all/nm.hex.unicode
	* testsuite/binutils-all/strings.escape.unicode
	* testsuite/binutils-all/objdump.highlight.unicode
	* testsuite/binutils-all/readelf.invalid.unicode

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