emscripten: 1.37.16 -> 1.37.34

Semi-automatic update. These checks were performed:

- built on NixOS
- found 1.37.34 with grep in /nix/store/mdr47v3wdjmzic5c2nvdx5krdwl6bcxf-emscripten-1.37.34

pkgs/development/compilers/emscripten/default.nix

@@ -3,7 +3,7 @@
 }:
 
 let
-  rev = "1.37.16";
+  rev = "1.37.34";
   appdir = "share/emscripten";
 in
 
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
   src = fetchFromGitHub {
     owner = "kripken";
     repo = "emscripten";
-    sha256 = "1qyhjx5zza01vnwmj6qzxbkagxknn4kzb6gw12fqw5q8pa8fy4zy";
+    sha256 = "1v62jg0b65shh10lbkvjg79xwnwwms6lr6w5vn1gaq6cpc712y19";
     inherit rev;
   };