Update secp256k1 to 84973d3

fanatid · fanatid · commit 5e6ddc024c1d · 2017-06-07T17:41:51.000+03:00
diff --git a/src/secp256k1-src b/src/secp256k1-src
@@ -1 +1 @@
-Subproject commit 9d560f992db26612ce2630b194aef5f44d63a530
+Subproject commit 84973d393ac240a90b2e1a6538c5368202bc2224
