Add '-ldl' to Linux targets that use dynamic loader functions.

base/base.gypi

 # Copyright (c) 2010 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'target_defaults': {
     'variables': {
       'base_target': 0,
     },
     'target_conditions': [
@@ skipping 362 matching lines @@
                     'LINUX_USE_TCMALLOC',
                   ],
                 },
               },
             ],
             [ 'OS == "linux"', {
               'link_settings': {
                 'libraries': [
                   # We need rt for clock_gettime().
                   '-lrt',
+                  # For 'native_library_linux.cc'
+                  '-ldl',
                 ],
               },
             }],
           ],
           'dependencies': [
             '../build/util/build_util.gyp:lastchange',
             '../build/linux/system.gyp:gtk',
             '../build/linux/system.gyp:nss',
             'symbolize',
             'xdg_mime',
@@ skipping 227 matching lines @@
             'third_party/xdg_mime/xdgmimemagic.c',
             'third_party/xdg_mime/xdgmimemagic.h',
             'third_party/xdg_mime/xdgmimeparent.c',
             'third_party/xdg_mime/xdgmimeparent.h',
           ],
         },
       ],
     }],
   ],
 }