clang/win/gn: Actually build 32-bit .obj files in 32-bit builds.

chrome/installer/mini_installer/BUILD.gn

 # Copyright 2015 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/features.gni")
 import("//build/config/ui.gni")
 import("//build_overrides/v8.gni")
 import("//chrome/version.gni")
 import("//third_party/icu/config.gni")
 import("//ui/base/ui_features.gni")
 
 config("mini_installer_compiler_flags") {
-  cflags = [
-    "/bigobj",
-    "/Gy",  # Enable function-level linking.
-    "/GS-",  # Disable buffer security checking.
-    "/FS",  # Preserve previous PDB behavior.
-  ]
-
-  cflags_c = [ "/TC" ]
-  cflags_cc = [ "/TP" ]
+  # Disable buffer security checking.
+  cflags = [ "/GS-" ]
 }
 
 source_set("lib") {
   sources = [
     "appid.h",
     "chrome.release",
     "chrome_appid.cc",
     "configuration.cc",
     "configuration.h",
     "decompress.cc",
     "decompress.h",
     "mini_installer.ico",
     "mini_installer.rc",
     "mini_installer_constants.cc",
     "mini_installer_constants.h",
     "mini_installer_resource.h",
     "mini_string.cc",
     "mini_string.h",
     "pe_resource.cc",
     "pe_resource.h",
     "regkey.cc",
     "regkey.h",
   ]
 
-  configs -= [ "//build/config/compiler:compiler" ]
   configs += [ ":mini_installer_compiler_flags" ]
 
   deps = [
     #"test_installer_sentinel",  TODO(GYP) bug 521052.
   ]
 }
 
 process_version("version") {
   template_file = "mini_installer_exe_version.rc.version"
   output = "$target_gen_dir/mini_installer_version.rc"
@@ skipping 114 matching lines @@
 executable("mini_installer") {
   sources = [
     "mini_installer.cc",
     packed_files_rc_file,
   ]
 
   # This target is special so we manually override most linker flags and
   # specify our own to keep the size down.
   configs -= [
     "//build/config:executable_config",
-    "//build/config/compiler:compiler",
     "//build/config/win:console",
   ]
   configs += [
     ":mini_installer_compiler_flags",
     "//build/config/win:sdk_link",
     "//build/config/win:windowed",
   ]
 
   ldflags = [
     "/ENTRY:MainEntryPoint",
@@ skipping 29 matching lines @@
     args = [
       "--out",
       "$target_name.exe",
     ]
     deps = [
       ":mini_installer",
       "//chrome/installer/test:alternate_version_generator",
     ]
   }
 }