deps: V8: cherry-pick 19173cde61d8

Original commit message:

    Make TagRange build without __builtin_unreachable

    Guard the call with V8_HAS_BUILTIN_UNREACHABLE, if it's not
    available in the toolchain, skip the compiler hint so it still
    compiles.

    Co-Authored-By: StefanStojanovic <stefan.stojanovic@janeasystems.com>
    Refs: #61898
    Change-Id: Ided07825644ffdd5b6aa7c6fa7f39ae3e62d2535
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/8517724
    Commit-Queue: Joyee Cheung <joyee@igalia.com>
    Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#110422}

Refs: v8/v8@19173cd
Signed-off-by: Joyee Cheung <joyeec9h3@gmail.com>

Author: joyeecheung

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.7',
+    'v8_embedder_string': '-node.8',
 
     ##### V8 defaults for Node.js #####
 

deps/v8/include/v8-internal.h

@@ -532,7 +532,7 @@ struct TagRange {
 
   // Construct the inclusive tag range [first, last].
   constexpr TagRange(Tag first, Tag last) : first(first), last(last) {
-#ifdef V8_ENABLE_CHECKS
+#if defined(V8_ENABLE_CHECKS) && V8_HAS_BUILTIN_UNREACHABLE
     // This would typically be a DCHECK, but that's not available here.
     if (first > last) __builtin_unreachable();  // Invalid tag range.
 #endif