[MIPS] Support for building tests for MIPS

tests/syscall_return_sandboxing/nacl.scons

 # -*- python -*-
 # Copyright (c) 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')
 
 # Do not run these tests with pexes, assuming they are portable, since
 # they use inline assembler.
 if env.Bit('bitcode') and env.Bit('pnacl_generate_pexe'):
   Return()
 
 # env's BUILD_ARCH, BUILD_SUBARCH controls what assembly files to use.
 def GetAssemblerFile(env):
   if env.Bit('build_x86_32'):
     return 'sandboxed_x86_32.S'
   elif env.Bit('build_x86_64'):
     return 'sandboxed_x86_64.S'
   elif env.Bit('build_arm'):
     return 'sandboxed_arm.S'
+  elif env.Bit('build_mips32'):
+    return 'sandboxed_mips.S'
   else:
     raise Exception('unknown architecture')
 
 asm_env = env.Clone()
 use_obj_env = env.Clone()
 
 if asm_env.Bit('bitcode'):
   asm_env.PNaClForceNative()
   # Allow use of native object file
   use_obj_env.Append(LINKFLAGS=['--pnacl-allow-native'])
@@ skipping 13 matching lines @@
 
 thread_create_bad_address_nexe = env.ComponentProgram(
     'thread_create_bad_address',
     env.RawSyscallObjects(['thread_create_bad_address.c']),
     EXTRA_LIBS=['${NONIRT_LIBS}'])
 node = env.CommandSelLdrTestNacl(
     'thread_create_bad_address.out',
     thread_create_bad_address_nexe)
 env.AddNodeToTestSuite(node, ['small_tests', 'nonpexe_tests'],
                        'run_thread_create_bad_address_test')