[bazel] Add hide symbols from release build

This is a reland of https://chromium-review.googlesource.com/c/v8/v8/+/3925698

Change-Id: Ic3f2084f29088fc2154931181da2b027b8ad7eff
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4042292
Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/main@{#84416}

bazel/config/BUILD.bazel

@@ -22,6 +22,13 @@ config_setting(
     },
 )
 
+config_setting(
+    name = "is_opt",
+    values = {
+        "compilation_mode": "opt",
+    },
+)
+
 config_setting(
     name = "is_debug",
     values = {

bazel/defs.bzl

@@ -152,6 +152,14 @@ def _default_args():
             ],
             "//conditions:default": [],
         }),
+        cxxopts = select({
+            "//third_party/v8/HEAD/google3/config:is_opt": [
+                "-fvisibility=hidden",
+                "-fvisibility-inlines-hidden",
+            ],
+            "//conditions:default": [
+            ],
+        }),
         includes = ["include"],
         linkopts = select({
             "@v8//bazel/config:is_windows": [