Disable -Wreorder when building with clang on Windows.

BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//third_party/icu/config.gni")
 
 # Meta target that includes both icuuc and icui18n. Most targets want both.
 # You can depend on the individually if you need to.
 group("icu") {
   deps = [
@@ skipping 60 matching lines @@
       "-Wno-logical-op-parentheses",
       "-Wno-tautological-compare",
       "-Wno-switch",
       "-Wno-parentheses",
       ]
     if (is_win) {
       cflags += [
         # See http://bugs.icu-project.org/trac/ticket/11122
         "-Wno-inline-new-delete",
         "-Wno-implicit-exception-spec-mismatch",
+        # See http://bugs.icu-project.org/trac/ticket/11757.
+        "-Wno-reorder",
       ]
     }
   }
 }
 
 component("icui18n") {
   sources = [
     "source/i18n/alphaindex.cpp",
     "source/i18n/anytrans.cpp",
     "source/i18n/astro.cpp",
@@ skipping 472 matching lines @@
         sources = [
           "android/icudtl_dat.S",
         ]
       } else {
         assert(false, "No icu data for this platform")
       }
       defines = [ "U_HIDE_DATA_SYMBOL" ]
     }
   }
 }