[libc] fix uint includes and libc bazel

[michaelrj]

Summary

This patch fixes the includes for the new UInt class so that the api
test now passes, additionally it fixes the bazel files to account for
the new dependencies.

libc/src/__support/CPP/UInt.h

 //===-- A class to manipulate wide integers. --------------------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_LIBC_UTILS_CPP_UINT_H
 #define LLVM_LIBC_UTILS_CPP_UINT_H
 
-#include "src/__support/CPP/Array.h"
+#include "Array.h"
 
 #include <stddef.h> // For size_t
 #include <stdint.h>
 
 namespace __llvm_libc {
 namespace cpp {
 
 template <size_t Bits> class UInt {

utils/bazel/llvm-project-overlay/libc/BUILD.bazel

 
 cc_library(
     name = "__support_cpp_string_view",
     hdrs = ["src/__support/CPP/StringView.h"],
     deps = [":libc_root"],
 )
 
 cc_library(
+    name = "__support_cpp_uint",
+    hdrs = [
+        "src/__support/CPP/UInt.h",
+    ],
+    deps = [":libc_root","__support_cpp_array"],
+)
+
+cc_library(
     name = "__support_cpp_type_traits",
     hdrs = [
         "src/__support/CPP/TypeTraits.h",
     ],
-    deps = [":libc_root"],
+    deps = [":libc_root","__support_cpp_uint"],
 )
 
 cc_library(
     name = "__support_cpp_utility",
     hdrs = ["src/__support/CPP/Utility.h"],
     deps = [
         ":__support_cpp_type_traits",
         ":libc_root",