Fix build with older versions of GCC.

This ports the change from bazel on v8:
https://crrev.com/c/3368869

Compilation errors started showing after this CL:
https://crrev.com/c/5199515

Change-Id: I8c161a0d9ad5c04d452c444ef4feafae2ef4f6db
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/5280535
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#92252}

BUILD.gn

@@ -1693,6 +1693,10 @@ config("toolchain") {
       # of `this` in capture-by-value lambdas and preventing a build roll which
       # enables C++20 (see https://crbug.com/1374227).
       "-Wno-deprecated",
+
+      # Fix build with older versions of GCC
+      # Ported from v8 bazel: https://crrev.com/c/3368869
+      "-Wno-stringop-overflow",
     ]
   }