Fix arm compilation. DiyFp multiplications are now in a separate procedure.

tools/gyp/v8.gyp

 # Copyright 2009 the V8 project authors. All rights reserved.
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 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
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 #     * Redistributions in binary form must reproduce the above
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@@ skipping 247 matching lines @@
         '../../src/dateparser.h',
         '../../src/dateparser-inl.h',
         '../../src/debug.cc',
         '../../src/debug.h',
         '../../src/debug-agent.cc',
         '../../src/debug-agent.h',
         '../../src/disasm.h',
         '../../src/disassembler.cc',
         '../../src/disassembler.h',
         '../../src/dtoa-config.c',
+        '../../src/diy_fp.cc',
         '../../src/diy_fp.h',
         '../../src/double.h',
         '../../src/execution.cc',
         '../../src/execution.h',
         '../../src/factory.cc',
         '../../src/factory.h',
         '../../src/fast-codegen.h',
         '../../src/flag-definitions.h',
         '../../src/flags.cc',
         '../../src/flags.h',
@@ skipping 353 matching lines @@
       ],
       'conditions': [
         [ 'OS=="win"', {
           # This could be gotten by not setting chromium_code, if that's OK.
           'defines': ['_CRT_SECURE_NO_WARNINGS'],
         }],
       ],
     },
   ],
 }