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

chrome/chrome_browser.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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': '<(library)',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 2178 matching lines @@
           'dependencies': [
             # Temporarily disabled while we figure some stuff out.
             # http://code.google.com/p/chromium/issues/detail?id=12351
             # '../build/linux/system.gyp:dbus-glib',
             # '../build/linux/system.gyp:gnome-keyring',
             '../build/linux/system.gyp:gtk',
             '../build/linux/system.gyp:gtkprint',
             '../build/linux/system.gyp:nss',
             '../base/base.gyp:linux_versioninfo',
           ],
+          'link_settings': {
+            'libraries': [
+              # For dlsym() in 'browser/zygote_main_linux.cc'
+              '-ldl',
+            ],
+          },
           'sources!': [
              # Exclude extension shelf for toolstrips.
             'browser/views/extensions/extension_shelf.cc',
             'browser/views/extensions/extension_shelf.h',
             'browser/views/extensions/extension_view.cc',
             'browser/views/extensions/extension_view.h',
              # Windows-specific files.
             'browser/password_manager/password_store_win.cc',
             'browser/password_manager/password_store_win.h',
           ],
@@ skipping 580 matching lines @@
       ],
     },
   ],
 }
 
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