Non-SFI mode: Add Linux asynchronous signal support

src/untrusted/pthread/nc_init_private.c

Index: src/untrusted/pthread/nc_init_private.c
diff --git a/src/untrusted/pthread/nc_init_private.c b/src/untrusted/pthread/nc_init_private.c
index d54cd5aeb293e5eee88dffd350f7e6234a5ae6e3..1493d384edc6f2b32cf522606eb0633dcd52dddb 100644
--- a/src/untrusted/pthread/nc_init_private.c
+++ b/src/untrusted/pthread/nc_init_private.c
@@ -10,7 +10,7 @@
 #include "native_client/src/untrusted/pthread/pthread_internal.h"
 
 static int nacl_irt_thread_create(void (*start_func)(void), void *stack,
-                                  void *thread_ptr) {
+                                  void *thread_ptr, nacl_irt_tid_t *tid) {
 #if defined(NACL_IN_IRT)
   /*
    * We want the first TLS to point to an unmapped location.  The
@@ -36,7 +36,7 @@ static int nacl_irt_thread_nice(const int nice) {
 }
 
 void __nc_initialize_interfaces(void) {
-  const struct nacl_irt_thread init = {
+  const struct nacl_irt_thread_v0_2 init = {
     nacl_irt_thread_create,
     nacl_irt_thread_exit,
     nacl_irt_thread_nice,