Update Binaryen to 7769139efbe818c7ba36d1a382db5114ebee9df8

This corresponds to a version rolled into google3, which hopefully
fixes Binaryen fetch problem on Flutter HHH.

Change-Id: I423a307a1fdb8a250ad41e4fb2ff05730856d10e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/274680
Reviewed-by: Martin Kustermann <[email protected]>

Author: askeksa

DEPS

@@ -111,7 +111,7 @@ vars = {
   "csslib_rev": "34203c09f073ed8267f5d6e333daddb02e6ff609",
 
   # Prefer to use hashes of binaryen that have been reviewed & rolled into g3.
-  "binaryen_rev" : "eeb838155dbff2fb6731f1ae5550cbb9494532fe",
+  "binaryen_rev" : "7769139efbe818c7ba36d1a382db5114ebee9df8",
 
   # Note: Updates to dart_style have to be coordinated with the infrastructure
   # team so that the internal formatter `tools/sdks/dart-sdk/bin/dart format`