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

tests/multiple_sandboxes/nacl.scons

 # -*- python -*-
 # Copyright 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.
 
 Import('env')
 
 if 'TRUSTED_ENV' not in env:
   Return()
 trusted_env = env['TRUSTED_ENV']
 
 # This duplicates the library list in src/trusted/service_runtime/build.scons.
 # We would not have to do this if we could get Scons to track dependencies
 # between libraries.
 VALIDATOR_LIBS = []
 if trusted_env.Bit('target_x86'):
   VALIDATOR_LIBS += [trusted_env.NaClTargetArchSuffix('ncvalidate_verbose')]
 elif trusted_env.Bit('target_arm'):
   VALIDATOR_LIBS += ['ncvalidate_arm_v2']
 
 DEBUG_LIBS = ['debug_stub_init', 'gdb_rsp', 'debug_stub']
 
+if trusted_env.Bit('linux'):
+  trusted_env.Append(LIBS=['dl'])
+
 runner = trusted_env.ComponentProgram(
     'multidomain_test_host', ['multidomain_test_host.c'],
     EXTRA_LIBS=['sel',
                 'manifest_proxy',
                 'simple_service',
                 'thread_interface',
                 'gio_wrapped_desc',
                 'nonnacl_srpc',
                 'nrd_xfer',
                 'nacl_perf_counter',
@@ skipping 34 matching lines @@
 #  * We disable this on x86-32 because it needs 2GB of address space
 #    and that might not be available given the vagaries of ASLR.
 is_broken = (env.Bit('build_arm')
              or env.Bit('build_x86_32')
              or env.Bit('host_mac')
              or env.Bit('host_windows')
              or env.Bit('nacl_glibc'))
 
 env.AddNodeToTestSuite(node, ['small_tests'], 'run_multidomain_test',
                        is_broken=is_broken)