Enable the service runtime to use a zero-based sandbox on Linux.

src/trusted/service_runtime/service_runtime.gyp

 # -*- python -*-
 # Copyright (c) 2011 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'conditions': [
       ['OS=="linux"', {
         'syscall_handler': [
@@ skipping 236 matching lines @@
       'type': 'executable',
       'dependencies': [
         'sel',
         '<(DEPTH)/native_client/src/shared/platform/platform.gyp:platform',
         '<(DEPTH)/native_client/src/trusted/gio/gio_wrapped_desc.gyp:gio_wrapped_desc',
         '<(DEPTH)/native_client/src/trusted/platform_qualify/platform_qualify.gyp:platform_qual_lib',
       ],
       'sources': [
         'sel_main.c',
       ],
+      'conditions': [
+        ['OS=="linux"', {
+          'link_settings': {
+            'libraries': [
+              '-ldl',
+            ],
+          },
+        }],
+      ],
     },
     # no tests are built here; see service_runtime_test.gyp
   ],
   'conditions': [
     ['OS=="win"', {
       'targets': [
         {
           'target_name': 'sel64',
           'type': 'static_library',
           'variables': {
@@ skipping 80 matching lines @@
           ],
           'sources': [
             'sel_main.c',
           ],
         },
         # TODO(bsy): no tests are built; see build.scons
       ],
     }],
   ]
 }