* ld.texino: Describe double-quoted string syntax for version

	* ld.texino: Describe double-quoted string syntax for version
	nodes.
	* ldlang.h (lang_new_vers_pattern): Add literal_p parameter.
	* ldgram.y (vers_defns): Allow NAME as well as VERS_IDENTIFIER.
	Adjust calls to lang_new_vers_pattern to pass literal_p argument.
	* ldlang.c (lang_vers_match): Fix indentation.  Do not glob-match
	version nodes without a pattern.
	(lang_new_vers_pattern): Add literal_p parameter.
	(lang_do_version_exports_section): Pass it.

	* ld-elfvers/vers.exp: Add vers31.
	* ld-elfvers/vers31.c: New file.
	* ld-elfvers/vers31.dsym: Likewise.
	* ld-elfvers/vers31.map: Likewise.
	* ld-elfvers/vers31.ver: Likewise.