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

native_client_sdk/src/tests/nacl_io_socket_test/event_test.cc

Index: native_client_sdk/src/tests/nacl_io_socket_test/event_test.cc
diff --git a/native_client_sdk/src/tests/nacl_io_socket_test/event_test.cc b/native_client_sdk/src/tests/nacl_io_socket_test/event_test.cc
index c342799afa66d7a1c2c7e16be217a5c1ce90ee8b..7a854d7c2338135744bece690d82d3de71781467 100644
--- a/native_client_sdk/src/tests/nacl_io_socket_test/event_test.cc
+++ b/native_client_sdk/src/tests/nacl_io_socket_test/event_test.cc
@@ -325,7 +325,7 @@ struct SignalInfo {
   uint32_t events;
 };
 
-void *SignalEmitter(void *ptr) {
+static void *SignalEmitterThread(void *ptr) {
   SignalInfo* info = (SignalInfo*) ptr;
   struct timespec ts;
   ts.tv_sec = 0;
@@ -356,7 +356,7 @@ TEST(EventTest, EmitterSignalling) {
   siginfo.ms_wait = TIMEOUT_SHORT;
   siginfo.events = KE_EXPECTED | KE_FILTERED;
   pthread_t tid;
-  pthread_create(&tid, NULL, SignalEmitter, &siginfo);
+  pthread_create(&tid, NULL, SignalEmitterThread, &siginfo);
 
   // Wait for the signal from the other thread and time it.
   gettimeofday(&start, NULL);