deps: V8: cherry-pick c21a93ec80d5

Original commit message:

    [sandbox] Fix JSDispatchTable entry mark-bit erasure

    A race condition exists in V8's concurrent marking and deoptimization
    logic where Code::SetMarkedForDeoptimization updates a dispatch table
    entry without running a write barrier. During concurrent marking, a
    background thread's CAS mark can be overwritten by the mutator's blind
    store, leading to a live entry being swept.

    Fixed: 525686865
    Change-Id: I0cebd44b62ad5c16c19d73e5586058b1d2265ee4
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/8074259
    Commit-Queue: Olivier Flückiger <olivf@chromium.org>
    Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
    Auto-Submit: Olivier Flückiger <olivf@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#108583}

Refs: v8/v8@c21a93e
Signed-off-by: Barath <barathraj048@gmail.com>

Author: barathraj048

common.gypi

@@ -44,7 +44,7 @@
 
     # 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.39',
+    'v8_embedder_string': '-node.40',
 
     ##### V8 defaults for Node.js #####
 

deps/v8/src/objects/code.cc

@@ -226,6 +226,10 @@ void Code::SetMarkedForDeoptimization(Isolate* isolate,
       } else {
         jdt.SetCodeNoWriteBarrier(handle, *BUILTIN_CODE(isolate, CompileLazy));
       }
+      // TODO(olivf, 525686865): Fix the race in dispatch handle marking by
+      // going back to a CAS loop.
+      static_assert(JSDispatchTable::kWriteBarrierSetsEntryMarkBit);
+      jdt.Mark(handle);
     }
     // Ensure we don't try to patch the entry multiple times.
     set_js_dispatch_handle(kNullJSDispatchHandle);