ccanlint: add missing file for "info_ported" test.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

tools/ccanlint/tests/info_ported.c

+#include <tools/ccanlint/ccanlint.h>
+#include <tools/tools.h>
+#include <ccan/str/str.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <err.h>
+#include <string.h>
+#include <ctype.h>
+
+static const char *can_build(struct manifest *m)
+{
+	/* FIXME: In safe mode, we'd need complex guesstiparsing. */
+	if (safe_mode)
+		return NULL;
+
+	if (get_ported(m, m->dir, true, get_or_compile_info))
+		return NULL;
+	return "'_info ported' says not supported";
+}
+
+static void check_info_ported(struct manifest *m,
+			      unsigned int *timeleft, struct score *score)
+{
+	score->pass = true;
+	score->score = 1;
+}
+
+struct ccanlint info_ported = {
+	.key = "info_ported",
+	.can_run = can_build,
+	.name = "_info indicates support for this platform",
+	.check = check_info_ported,
+	.needs = "info_exists"
+};
+
+REGISTER_TEST(info_ported);