fix(ci): wire C library headers into ICU custom-libcxx deps

The patched bazel/BUILD.icu builds icuuc/icui18n with -nostdinc++ and the
custom libc++ headers, so their include_next C-compat wrappers hit the
same dead-end as the v8 targets: no glibc headers in the search path,
C symbols like memcpy/memset unresolved (cmemory.h errors).

Add rusty_v8_c_library_headers to CUSTOM_LIBCXX_DEPS alongside the
headers/runtime wrappers.

Author: KooshaPari

patches/v8_bazel_rules.patch

@@ -384,7 +384,7 @@ diff --git a/orig/v8-14.9.207.2/bazel/BUILD.icu b/mod/v8-14.9.207.2/bazel/BUILD.
 index 5fda2f4..8c3c372 100644
 --- a/orig/v8-14.9.207.2/bazel/BUILD.icu
 +++ b/mod/v8-14.9.207.2/bazel/BUILD.icu
-@@ -1,3 +1,24 @@
+@@ -1,3 +1,25 @@
 +load("@rules_cc//cc:defs.bzl", "cc_library")
 +
 +CUSTOM_LIBCXX_COPTS = select({
@@ -402,14 +402,15 @@ index 5fda2f4..8c3c372 100644
 +    "@v8//:is_v8_use_rusty_v8_custom_libcxx": [
 +        "@@//third_party/v8:rusty_v8_custom_libcxx_headers",
 +        "@@//third_party/v8:rusty_v8_custom_libcxx_runtime",
++        "@@//third_party/v8:rusty_v8_c_library_headers",
 +    ],
 +    "//conditions:default": [],
 +})
 +
  # Copyright 2021 the V8 project authors. All rights reserved.
  # Use of this source code is governed by a BSD-style license that can be
  # found in the LICENSE file.
-@@ -16,15 +37,12 @@ cc_library(
+@@ -16,15 +38,12 @@ cc_library(
      ]),
      copts = select({
          "@platforms//os:windows": [
@@ -427,15 +428,15 @@ index 5fda2f4..8c3c372 100644
      data = [":icudata"],
      defines = [
          "HAVE_DLOPEN=0",
-@@ -54,6 +72,7 @@ cc_library(
+@@ -54,6 +73,7 @@ cc_library(
          "U_ICUDATAENTRY_IN_COMMON",
      ],
      tags = ["requires-rtti"],
 +    deps = CUSTOM_LIBCXX_DEPS,
      alwayslink = 1,
  )
 
-@@ -65,19 +84,16 @@ cc_library(
+@@ -65,19 +85,16 @@ cc_library(
      ]),
      copts = select({
          "@platforms//os:windows": [
@@ -458,7 +459,7 @@ index 5fda2f4..8c3c372 100644
      alwayslink = 1,
  )
 
-@@ -93,13 +109,10 @@ cc_library(
+@@ -93,13 +110,10 @@ cc_library(
      ]),
      copts = select({
          "@platforms//os:windows": [
@@ -474,7 +475,7 @@ index 5fda2f4..8c3c372 100644
      include_prefix = "third_party/icu",
      local_defines = [
          "U_COMMON_IMPLEMENTATION",
-@@ -108,6 +121,6 @@ cc_library(
+@@ -108,6 +122,6 @@ cc_library(
      deps = [
          ":icui18n",
          ":icuuc",