[build] Fix msan after clang roll.

build/standalone.gypi

 # Copyright 2012 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 557 matching lines @@
                 ],
               }],
             ],
           }],
           ['msan==1', {
             'target_conditions': [
               ['_toolset=="target"', {
                 'cflags': [
                   '-fsanitize=memory',
                   '-fsanitize-memory-track-origins=<(msan_track_origins)',
+                  '-fPIC',

[Nico, 2015/11/26 15:11:22]

upstream we added comments to remind us to remove them again:
https://chromium.googlesource.com/chromium/src/+/4fea0f71e935f43777c5f0c0b488...

                 ],
                 'ldflags': [
                   '-fsanitize=memory',
+                  '-pie',
                 ],
                 'defines': [
                   'MEMORY_SANITIZER',
                 ],
               }],
             ],
           }],
           ['use_custom_libcxx==1', {
             'dependencies': [
               '<(DEPTH)/buildtools/third_party/libc++/libc++.gyp:libcxx_proxy',
@@ skipping 742 matching lines @@
               '-fsanitize=cfi-vcall',
               '-fsanitize=cfi-derived-cast',
               '-fsanitize=cfi-unrelated-cast',
             ],
           }],
         ],
       },
     }],
   ],
 }