deps: V8: cherry-pick bdcda72cd1d8

Original commit message:

    [platform] Fix compilation on 32-bit Windows

    Use `extern "C"` to declare the __readfsdword function.
    Fixes error C2732 in the Node.js CI.

    Bug: chromium:796644
    Change-Id: If261985e65bfdade53ce06ff28afe0e2db402f7a
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3086457
    Reviewed-by: Clemens Backes <clemensb@chromium.org>
    Commit-Queue: Michaël Zasso <mic.besace@gmail.com>
    Cr-Commit-Position: refs/heads/master@{#76259}

Refs: v8/v8@bdcda72

Backport-PR-URL: nodejs#40285
PR-URL: nodejs#39945
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>

common.gypi

@@ -36,7 +36,7 @@
 
     # 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.8',
+    'v8_embedder_string': '-node.9',
 
     ##### V8 defaults for Node.js #####
 

deps/v8/src/base/platform/platform.h

@@ -47,7 +47,7 @@
 // And, intrin.h is a very expensive header that we want to avoid here, and
 // the cheaper intrin0.h is not available for all build configurations. That is
 // why we declare this intrinsic.
-unsigned long __readfsdword(unsigned long);  // NOLINT(runtime/int)
+extern "C" unsigned long __readfsdword(unsigned long);  // NOLINT(runtime/int)
 #endif                                       // V8_CC_MSVC && V8_HOST_ARCH_IA32
 #endif                                       // V8_NO_FAST_TLS