[NaCl SDK] nacl_io: Add initial implementations of kill and signal

native_client_sdk/src/tests/nacl_io_test/example.dsc

 {
   'TOOLS': ['newlib', 'glibc', 'pnacl'],
   'SEL_LDR': True,
 
   # Need to add ../../examples for common.js
   'SEARCH': ['.', '../../examples'],
   'TARGETS': [
     {
       'NAME' : 'nacl_io_test',
       'TYPE' : 'main',
@@ skipping 21 matching lines @@
         'mount_mock.h',
         'mount_node_mock.cc',
         'mount_node_mock.h',
         'mount_node_test.cc',
         'mount_node_tty_test.cc',
         'mount_test.cc',
         'path_test.cc',
         'pepper_interface_mock.cc',
         'pepper_interface_mock.h',
         'socket_test.cc',
+        'syscalls_test.cc',
       ],
       'DEPS': ['ppapi_simple', 'nacl_io'],
       # Order matters here: gtest has a "main" function that will be used if
       # referenced before ppapi.
       'LIBS': ['gmock', 'ppapi_cpp', 'ppapi', 'gtest', 'pthread'],
       'INCLUDES': ['$(NACL_SDK_ROOT)/include/gtest/internal'],
       'CXXFLAGS': ['-Wno-sign-compare', '-Wno-unused-private-field'],
       'CFLAGS_GCC': ['-Wno-unused-local-typedefs'],
     }
   ],
   'DATA': [
     'example.js'
   ],
   'DEST': 'tests',
   'NAME': 'nacl_io_test',
   'TITLE': 'NaCl IO test',
 }