GN fixes

build/config/compiler/BUILD.gn

 # Copyright (c) 2013 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("//build/config/linux/sysroot.gni")
 
 # Base compiler configuration.
 config("compiler") {
   include_dirs = [ "//", root_gen_dir ]
   if (is_win) {
@@ skipping 36 matching lines @@
 
       # These flags are shared between the C compiler and linker.
       common_mac_flags = [
         "-isysroot", sysroot,
         "-mmacosx-version-min=10.6",
       ]
 
       # CPU architecture.
       if (cpu_arch == "x64") {
         common_mac_flags += "-arch x86_64"
-      } else if (cpu_arch == "x32") {
+      } else if (cpu_arch == "x86") {
         common_mac_flags += "-arch i386"
       }
 
       cflags += common_mac_flags + [
         # Without this, the constructors and destructors of a C++ object inside
         # an Objective C struct won't be called, which is very bad.
         "-fobjc-call-cxx-cdtors",
       ]
 
       cflags_c += [ "-std=c99" ]
@@ skipping 347 matching lines @@
   } else {
     cflags = [ "-g1" ]
   }
 }
 
 config("no_symbols") {
   if (!is_win) {
     cflags = [ "-g0" ]
   }
 }