Add asn1 parser of mbed-tls
This bundles the asn1 parser from mbed-tls into mcuboot, which allows
adding EC crypto (tinycrypt based) functionality for target OSes that
don't bundle mbed-tls.
Signed-off-by: Fabio Utzig <utzig@apache.org>
diff --git a/ext/mbedtls/README b/ext/mbedtls/README
new file mode 100644
index 0000000..b6b4dcb
--- /dev/null
+++ b/ext/mbedtls/README
@@ -0,0 +1,3 @@
+This bundles the asn1 parser from mbed-tls into mcuboot, which allows
+adding EC crypto (tinycrypt based) functionality for target OSes that
+don't bundle mbed-tls.