Try to fix AOSP builder.

build/toolchain.gypi

 # Copyright 2013 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 211 matching lines @@
                   [ 'arm_thumb==1', {
                     'cflags': ['-mthumb',],
                   }],
                   [ 'arm_thumb==0', {
                     'cflags': ['-marm',],
                   }],
                 ],
               }, {
                 # 'v8_target_arch!=target_arch'
                 # Target not built with an Arm CXX compiler (simulator build).
-                'cflags': [
-                  '-msse2',
-                  '-mfpmath=sse',
-                  '-mmmx',  # Allows mmintrin.h for MMX intrinsics.
-                ],
                 'conditions': [
                   [ 'arm_float_abi=="hard"', {
                     'defines': [
                       'USE_EABI_HARDFLOAT=1',
                     ],
                   }],
                   [ 'arm_float_abi=="softfp" or arm_float_abi=="default"', {
                     'defines': [
                       'USE_EABI_HARDFLOAT=0',
                     ],
@@ skipping 900 matching lines @@
           ['v8_enable_slow_dchecks==1', {
             'defines': [
               'ENABLE_SLOW_DCHECKS',
             ],
           }],
         ],  # conditions
       },  # Release
     },  # configurations
   },  # target_defaults
 }