Sandbox example placeholder

dist-files/Makefile.sandbox

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+#
+#  Example Makefile for building the sandbox example
+#
+
+sandbox:
+	gcc -o $@ -std=c99 -O2 -Wall -Wextra -Isrc/ \
+		src/duktape.c examples/sandbox/sandbox.c -lm

examples/sandbox/README.rst

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+===============
+Sandbox example
+===============
+
+Very simple, minimal sandboxing example.

examples/sandbox/sandbox.c

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+/*
+ *  Sandboxing example
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "duktape.h"
+
+int main(int argc, char *argv[]) {
+	/* FIXME */
+
+	/* Suppress warnings. */
+	(void) argc;
+	(void) argv;
+
+	return 1;
+}