Fix problems in CTF handling code exposed by the Coverity static analysis tool.

Fix problems in CTF handling code exposed by the Coverity static analysis tool.

readelf	* readelf.c (parse_args): Silence potential warnings about a
	memory resource leak when allocating space for ctf option values.
	(dump_section_as_ctf): Fix typo checking dump_ctf_strtab_name
	variable.

libctf	* ctf-archive.c (ctf_arc_write): Avoid calling close twice on the
	same file descriptor.