Fix typo "contols"

build/toolchain/gcc_toolchain.gni

 # 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/clang/clang.gni")
 import("//build/config/nacl/config.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/v8_target_cpu.gni")
 import("//build/toolchain/cc_wrapper.gni")
 import("//build/toolchain/goma.gni")
@@ skipping 55 matching lines @@
 #      toolchain is updated.
 #  - shlib_extension
 #      If this string is specified it will be used for the file extension
 #      for a shared library, rather than default value specified in
 #      toolchain.gni
 #  - strip
 #      Location of the strip executable. When specified, strip will be run on
 #      all shared libraries and executables as they are built. The pre-stripped
 #      artifacts will be put in lib.unstripped/ and exe.unstripped/.
 #
-# Optional build argument contols.
+# Optional build argument controls.

[Nico, 2016/08/05 00:55:57]

I noticed this one while writing the is_asan CL I just sent you, and then I
figured I'd cs for "contols" and fixed the other instances too.

 #
 #  - clear_sanitizers
 #      When set to true, is_asan, is_msan, etc.will all be set to false. Often
 #      secondary toolchains do not want to run with sanitizers.
 #  - is_clang
 #      Whether to use clang instead of gcc.
 #  - is_component_build
 #      Whether to forcibly enable or disable component builds for this
 #      toolchain; if not specified, the toolchain will inherit the
 #      default setting.
@@ skipping 451 matching lines @@
                              "toolchain_os",
                              "use_gold",
                              "v8_toolchain_cpu",
                            ])
 
     if (defined(invoker.use_debug_fission)) {
       use_debug_fission = invoker.use_debug_fission
     }
   }
 }