GN fixes

build/toolchain/linux/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.
 
 cc = "gcc"
 cxx = "g++"
 ar = "ar"
 ld = cxx
 
 # The toolchains below all issue the same commands with some different flags.
@@ skipping 105 matching lines @@
     description = "STAMP \$out"
   }
   tool("copy") {
     command = copy_command
     description = "COPY \$in \$out"
   }
 
   # When invoking this toolchain not as the default one, these args will be
   # passed to the build. They are ignored when this is the default toolchain.
   toolchain_args() {
-    cpu_arch = "x32"
+    cpu_arch = "x86"
   }
 }
 
 # 64-bit -----------------------------------------------------------------------
 
 toolchain("64") {
   # Make these apply to all tools below.
   lib_prefix = "-l"
   lib_dir_prefix="-L"
 
@@ skipping 34 matching lines @@
     command = copy_command
     description = "COPY \$in \$out"
   }
 
   # When invoking this toolchain not as the default one, these args will be
   # passed to the build. They are ignored when this is the default toolchain.
   toolchain_args() {
     cpu_arch = "x64"
   }
 }