deps: V8: cherry-pick 931bdbd76f5b

Original commit message:

    [torque] fix build on VS2017

    Node.js build fails on VS2017 without these headers, see the downstream
    issue (#128).

    Co-authored-by: Ben Noordhuis <[email protected]>
    Co-authored-by: gengjiawen <[email protected]>
    Change-Id: I771eab435dce5cf548581f3acd78681180c77692
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2093951
    Reviewed-by: Tobias Tebbi <[email protected]>
    Commit-Queue: Tobias Tebbi <[email protected]>
    Cr-Commit-Position: refs/heads/master@{#66661}

Refs: v8/v8@931bdbd

Author: mmarchini

common.gypi

@@ -35,7 +35,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.6',
+    'v8_embedder_string': '-node.7',
 
     ##### V8 defaults for Node.js #####