samples: Create a zephyr sample
Most of the meat of this is in the Makefile, which is able to build the
bootloader, and two small applications, along with instructions on how
to load these into flash and test that upgrades work.
JIRA: MCUB-62
Signed-off-by: David Brown <david.brown@linaro.org>
diff --git a/samples/zephyr/README.md b/samples/zephyr/README.md
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+# Zephyr sample application.
+
+In order to successfully deploy an application using mcuboot, it is
+necessary to build at least one other binary: the application itself.
+It is beyond the scope of this documentation to describe what an
+application is able to do, however a working example is certainly
+useful.
+
+Please see the comments in the Makefile in this directory for more
+details on how to build and test this application.
+
+The hello applications were taken directly from the Zephyr source
+tree.