loadtools/scripts: gtm900.config renamed to gen4.config It turns out that a GTM900 variant exists with 8 MiB flash, thus -h gen8 needs to be used for GTM900 modules as the general case, and the old -h gtm900 config is best renamed to -h gen4, although not currently official for any actual target.

extern void serial_out();

void
putchar(ch)
{
	if (ch == '\n')
		serial_out('\r');
	serial_out(ch);
}