Replaced strerror() calls with threadsafe strerror_r()

runtime/bin/eventhandler_android.cc

Index: runtime/bin/eventhandler_android.cc
diff --git a/runtime/bin/eventhandler_android.cc b/runtime/bin/eventhandler_android.cc
index 258a96b2112ca957e2d3ef686dbf86c73ad2db1b..90f94b41be3fd8c69a3a82ffa70e3beafa0daf9e 100644
--- a/runtime/bin/eventhandler_android.cc
+++ b/runtime/bin/eventhandler_android.cc
@@ -88,7 +88,10 @@ static void UpdateEpollInstance(intptr_t epoll_fd_, SocketData* sd) {
       sd->set_tracked_by_epoll(true);
     }
     if (status == -1) {
-      FATAL1("Failed updating epoll instance: %s", strerror(errno));
+      const int kBufferSize = 1024;
+      char error_message[kBufferSize];
+      strerror_r(errno, error_message, kBufferSize);
+      FATAL1("Failed updating epoll instance: %s", error_message);
     }
   }
 }
@@ -306,7 +309,10 @@ intptr_t EventHandlerImplementation::GetPollEvents(intptr_t events,
             event_mask = (1 << kCloseEvent);
             sd->MarkClosedRead();
           } else if (errno != EWOULDBLOCK) {
-            Log::PrintErr("Error recv: %s\n", strerror(errno));
+            const int kBufferSize = 1024;
+            char error_message[kBufferSize];
+            strerror_r(errno, error_message, kBufferSize);
+            Log::PrintErr("Error recv: %s\n", error_message);
           }
         }
       }