gcc_release (error, inform): Use $@ instead of $1.

gcc_release (error, inform): Use $@ instead of $1.

	* gcc_release (error, inform): Use $@ instead of $1.
	(build_sources): Check for ^[[:blank:]]*GCC in both index.html
	and changes.html, rather than for GCC in one and ^GCC in another one.

From-SVN: r265526