Scons: Move some library dependency declarations into library_deps.py

tests/custom_desc/nacl.scons

 # -*- python -*-
 # Copyright 2012 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.
 test_host = trusted_env.ComponentProgram(
     'desc_test_host', ['desc_test_host.c'],
-    EXTRA_LIBS=['sel',
-                'nacl_interval',
-                'sel_debug_dummy',
-                'manifest_proxy',
-                'simple_service',
-                'thread_interface',
-                'gio_wrapped_desc',
-                'nonnacl_srpc',
-                'nrd_xfer',
-                'nacl_perf_counter',
-                'nacl_base',
-                'imc',
-                'container',
-                'nacl_fault_inject',
-                'platform',
-                'platform_qual_lib',
-                'gio',
-                ])
+    EXTRA_LIBS=['sel', 'sel_debug_dummy'])
 
 test_guest = env.ComponentProgram(
     'desc_test_guest', ['desc_test_guest.c'],
     EXTRA_LIBS=['imc_syscalls', '${NONIRT_LIBS}'])
 
 if env.Bit('pnacl_generate_pexe'):
   test_guest = env.GetTranslatedNexe(test_guest)
 
 test_command = [test_host, test_guest]
 bootstrap, _ = env.GetBootstrap()
 if bootstrap is not None:
   test_command = [bootstrap] + test_command
 
 node = env.CommandTest('custom_desc_test.out', test_command)
 env.AddNodeToTestSuite(node, ['small_tests'], 'run_custom_desc_test',
                        is_broken=not env.Bit('nacl_static_link'))