[wasm] Update the wasm spec tests.

This CL updates the hook for the WebAssembly spec repository, and it
updates the WebAssembly spec tests. The WebAssembly spec tests have to
be updated manually with the tools/wasm/update-wasm-spec-tests.sh
script. Mircea, I saw that you updated the WebAssembly spec repository
last time. Can you please take a look?

UPDATE: I improved the update script slightly, and there is one
additional JS API test we fail now and have to fix eventually.

R=mtrofin@chromium.org

Change-Id: I3c0df9cee64d444147db47daa0c1936edf116173
Reviewed-on: https://chromium-review.googlesource.com/509257Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45692}

DEPS

@@ -40,7 +40,7 @@ deps = {
   "v8/tools/clang":
     Var("chromium_url") + "/chromium/src/tools/clang.git" + "@" + "7474c164400afb1414249dc61f48c0f8c56bfac6",
   "v8/test/wasm-js":
-    Var("chromium_url") + "/external/github.com/WebAssembly/spec.git" + "@" + "07fd6430f879d36928d179a62d9bdeed82286065",
+    Var("chromium_url") + "/external/github.com/WebAssembly/spec.git" + "@" + "c4774b47d326e4114f96232f1389a555639d7348",
 }
 
 deps_os = {

test/mjsunit/wasm/jsapi-harness.js

@@ -14,6 +14,8 @@ const known_failures = {
     'https://bugs.chromium.org/p/v8/issues/detail?id=5507',
   "'WebAssembly.Table.prototype.set' method":
     'https://bugs.chromium.org/p/v8/issues/detail?id=5507',
+  "'WebAssembly.Instance.prototype.exports' accessor property":
+    'https://bugs.chromium.org/p/v8/issues/detail?id=5507'
 };
 
 let failures = [];

test/wasm-spec-tests/tests.tar.gz.sha1

-5f9abe489629911cd1ea4c47f45ae2b3f9050a44
\ No newline at end of file
+6f42a1e559ccf6187f0bddfde47951895d88b327
\ No newline at end of file

tools/wasm/update-wasm-spec-tests.sh

@@ -13,7 +13,7 @@ cd ${V8_DIR}
 mkdir -p ./test/wasm-spec-tests/tests/
 rm -rf ./test/wasm-spec-tests/tests/*
 
-./tools/dev/gm.py x64.release all
+./tools/dev/gm.py x64.release d8
 
 cd ${V8_DIR}/test/wasm-js/interpreter
 make