wasmtime: 20191018 -> 20191111

With this bump, we pull in support for building on darwin, i.e.
https://github.com/bytecodealliance/wasmtime/issues/516

pkgs/development/interpreters/wasmtime/default.nix

@@ -2,17 +2,17 @@
 
 rustPlatform.buildRustPackage {
   pname = "wasmtime";
-  version = "20191018";
+  version = "20191111";
 
   src = fetchFromGitHub {
     owner = "CraneStation";
     repo = "wasmtime";
-    rev = "ebef2c6b5720fce164af9ded8b7ff3dd5d7e041c";
-    sha256 = "15wa0by7lb90qd6fg8i2v1hw7hgbkrh1rqhrf7z850c9ydah6n13";
+    rev = "0006a2af954eba74c79885cb1fe8cdeb68f531c1";
+    sha256 = "0lf3pdkjxcrjmjic7xxyjl5dka3arxi809sp9hm4hih5p2fhf2gw";
     fetchSubmodules = true;
   };
 
-  cargoSha256 = "07qz6wl32j6gzc9nxv0dr7y6ixmzbzv5j1flkrysdrfidxlldn9k";
+  cargoSha256 = "0mnwaipa2az3vpgbz4m9siz6bfyhmzwz174k678cv158m7mxx12f";
 
   cargoPatches = [ ./cargo-lock.patch ];