Add mynewt testplan

Signed-off-by: Fabio Utzig <utzig@apache.org>
diff --git a/testplan/mynewt/key_ec_2.pem b/testplan/mynewt/key_ec_2.pem
new file mode 100644
index 0000000..82dff43
--- /dev/null
+++ b/testplan/mynewt/key_ec_2.pem
@@ -0,0 +1,5 @@
+-----BEGIN EC PRIVATE KEY-----
+MGgCAQEEHCN8/JmSnXMbwvimYU61t5J3BqSog3UD9rszWEugBwYFK4EEACGhPAM6
+AATihCbugkqIXekQOh7iZZZPghfS/bQID5ad8FRY1xnL5rBd2nR7gFqTXxV9M9tF
+EJFA+MwFnIbgng==
+-----END EC PRIVATE KEY-----