Mark old Module::Instantiate method as deprecated

Embedders should use Module::InstantiateModule

R=neis@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Iebd5beeeeb9ea7025c61b97b666827e0a6ec89ad
Reviewed-on: https://chromium-review.googlesource.com/519162Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Jochen Eisinger <jochen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45655}

include/v8.h

@@ -1113,7 +1113,7 @@ class V8_EXPORT Module {
    * instantiation. (In the case where the callback throws an exception, that
    * exception is propagated.)
    */
-  V8_DEPRECATE_SOON("Use Maybe<bool> version",
+  V8_DEPRECATED("Use Maybe<bool> version",
                 bool Instantiate(Local<Context> context,
                                  ResolveCallback callback));
   V8_WARN_UNUSED_RESULT Maybe<bool> InstantiateModule(Local<Context> context,