Simple example of secp256k1 library

Revision:
2:6b892a0b43e5
Parent:
0:23d71aa111c7
--- a/mbed_app.json	Mon Sep 16 06:35:21 2019 +0000
+++ b/mbed_app.json	Mon Sep 16 12:17:13 2019 +0000
@@ -1,3 +1,7 @@
 {
-    "requires": ["bare-metal"]
+    "target_overrides": {
+        "*": {
+            "rtos.main-thread-stack-size": "8192"
+        }
+    }
 }
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