[dart2wasm] Roll binaryen to newer version (was 2 months old)

Change-Id: I10adbcaf756f52b5f7b75ca559eb4aff562c07b4
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/400540
Reviewed-by: Slava Egorov <[email protected]>
Commit-Queue: Martin Kustermann <[email protected]>

Author: mkustermann

DEPS

@@ -97,7 +97,7 @@ vars = {
   ### /third_party/ dependencies
 
   # Prefer to use hashes of binaryen that have been reviewed & rolled into g3.
-  "binaryen_rev" : "93883fde36ac158fd415dcd6dbd387dcfd928d3c",
+  "binaryen_rev" : "87f9dac127b387715d8d96ac7ec8fd469d8c2dab",
   "boringssl_rev": "57f525e425a95e7c89fa2df926fa93273bd47311",
   "browser-compat-data_tag": "ac8cae697014da1ff7124fba33b0b4245cc6cd1b", # v1.0.22
   "cpu_features_rev": "936b9ab5515dead115606559502e3864958f7f6e",