Fix date in latest ChangeLog entry
	* faq-programming.xml (faq.programming.64bitporting): New FAQ entry.
	(faq.programming.objective-c): Include gcc4.
	(faq.programming.make-execvp): Drop text discouraging usage of -j.
	(faq.programming.undeclared-functions): Drop entry.
	(faq.programming.x86-assembly): Ditto.
	(faq.programming.djgpp): Ditto.
	* faq-programming.xml (faq.programming.64bitporting): Mention the
	-Wformat and -Wall gcc options.
	* faq-programming.xml (faq.programming.64bitporting): Extend entry.
	(faq.programming.64bitporting-fail): New entry.
	(faq.programming.64bitporting-cygwin64): New entry.
	* faq-programming.xml (faq.programming.64bitporting): Fix typo.