Enable shared library on android

build/android.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 104 matching lines @@
           'HAVE_OFF64_T',
           'HAVE_SYS_UIO_H',
           'ANDROID_BINSIZE_HACK', # Enable temporary hacks to reduce binsize.
         ],
         'ldflags!': [
           '-pthread',  # Not supported by Android toolchain.
         ],
         'ldflags': [
           '-nostdlib',
           '-Wl,--no-undefined',
-          # Don't export symbols from statically linked libraries.
-          '-Wl,--exclude-libs=ALL',
         ],
         'libraries!': [
             '-lrt',  # librt is built into Bionic.
             # Not supported by Android toolchain.
             # Where do these come from?  Can't find references in
             # any Chromium gyp or gypi file.  Maybe they come from
             # gyp itself?
             '-lpthread', '-lnss3', '-lnssutil3', '-lsmime3', '-lplds4', '-lplc4', '-lnspr4',
           ],
           'libraries': [
@@ skipping 75 matching lines @@
             ],
             'libraries': [
               # crtend_android.o needs to be the last item in libraries.
               # Do not add any libraries after this!
               '<(android_lib)/crtend_android.o',
             ],
           }],
           ['_type=="shared_library"', {
             'ldflags': [
               '-Wl,-shared,-Bsymbolic',
+              '<(android_lib)/crtbegin_so.o',
+            ],
+          }],
+          ['_type=="static_library"', {
+            'ldflags': [
+              # Don't export symbols from statically linked libraries.
+              '-Wl,--exclude-libs=ALL',
             ],
           }],
         ],
       }],  # _toolset=="target"
       # Settings for building host targets using the system toolchain.
       ['_toolset=="host"', {
         'cflags': [ '-m32', '-pthread' ],
         'ldflags': [ '-m32', '-pthread' ],
         'ldflags!': [
           '-Wl,-z,noexecstack',
           '-Wl,--gc-sections',
           '-Wl,-O1',
           '-Wl,--as-needed',
         ],
       }],
     ],  # target_conditions
   },  # target_defaults
 }