Fix the conversions of section names

[yutaro-sakamoto]

The following process may fail if section names contain non-ASCII characters

opensourcecobol4j/cobj/codegen.c

Lines 5814 to 5854 in 5e6875d

	static void joutput_label_variable_name(char *s, int key,
	struct cb_label *section) {
	joutput(CB_PREFIX_LABEL);
	if (s) {
	if (section && section->name) {
	const char *c;
	for (c = (const char *)section->name; *c; ++c) {
	if (*c == ' ') {
	joutput("_");
	} else if (*c == '-') {
	joutput("_");
	} else {
	joutput("%c", *c);
	}
	}
	joutput("__");
	}
	char buf[COB_SMALL_BUFF];
	strcpy_identifier_cobol_to_java(buf, s);
	char *p = buf;
	while (*p) {
	if (*p < 0x80) {
	if (*p == '-') {
	*p = '_';
	} else if (*p == ' ') {
	*p = '_';
	}
	p++;
	} else {
	if (*(p + 1) == '\0') {
	break;
	} else {
	p = p + 2;
	}
	}
	}
	joutput("%s", buf);
	} else {
	joutput("anonymous__%d", key);
	}
	}