Issue 1548 - manually disable usage of v8_random_seed in gyp

common.gypi

 {
   'variables': {
     'visibility%': 'hidden',
     'library%': 'static_library',
     'component%': '',
     'want_separate_host_toolset': 0,
     'v8_optimized_debug': 0,
     'v8_enable_i18n_support': 0,
     'v8_use_external_startup_data%': 0,
+    'v8_random_seed%': 0,
   },
 
   'conditions': [
     ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris" \
        or OS=="netbsd" or OS=="android"', {
       'target_defaults': {
         'cflags': [ '-Wall', '-W', '-Wno-unused-parameter',
                     '-Wnon-virtual-dtor', '-pthread', '-fno-rtti',
                     '-pedantic', '-std=c++0x', '-fexceptions', ],
         'cflags!': [ '-Werror', ],
@@ skipping 16 matching lines @@
           '-pthread',  # Not supported by Android toolchain.
         ],
       },
     }],
   ],
 
   'target_defaults': {
     'msvs_cygwin_shell': 0,
   }
 }