Change stack alignment on linux to 16 bytes to keep gcc 4.4 happy....

tools/gyp/v8.gyp

 # Copyright 2009 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 289 matching lines @@
             ],
             'cflags': [
               '-fomit-frame-pointer',
               '-O3',
             ],
             'conditions': [
               [ 'gcc_version=="44"', {
                 'cflags': [
                     # Avoid gcc 4.4 strict aliasing issues in dtoa.c
                     '-fno-strict-aliasing',
-                    # Avoid gcc 4.4 mksnapshot segfault.
-                    '-fno-tree-vectorize',
                     # Avoid crashes with gcc 4.4 in the v8 test suite.
                     '-fno-tree-vrp',
                 ],
               }],
             ],
             'cflags_cc': [
               '-fno-rtti',
             ],
           }],
           ['OS=="win"', {
@@ skipping 412 matching lines @@
         ],
         'msvs_settings': {
           'VCLinkerTool': {
             'AdditionalOptions': '/IGNORE:4221 /NXCOMPAT',
           },
         },
       },
     }],
   ],
 }