Fix error-checking when calling timerfd_create.

runtime/bin/eventhandler_linux.cc

Index: runtime/bin/eventhandler_linux.cc
diff --git a/runtime/bin/eventhandler_linux.cc b/runtime/bin/eventhandler_linux.cc
index a7a1049203df9580db8619755e7eab9fc6148681..612f3cb811ecaf108d372ad31cfb98bf9c3fb27d 100644
--- a/runtime/bin/eventhandler_linux.cc
+++ b/runtime/bin/eventhandler_linux.cc
@@ -64,12 +64,12 @@ EventHandlerImplementation::EventHandlerImplementation() : shutdown_(false) {
   static const int kEpollInitialSize = 64;
   epoll_fd_ = TEMP_FAILURE_RETRY(epoll_create(kEpollInitialSize));
   if (epoll_fd_ == -1) {
-    FATAL("Failed creating epoll file descriptor");
+    FATAL1("Failed creating epoll file descriptor: %i", errno);
   }
   FDUtils::SetCloseOnExec(epoll_fd_);
   timer_fd_ = TEMP_FAILURE_RETRY(timerfd_create(CLOCK_REALTIME, TFD_CLOEXEC));
-  if (epoll_fd_ == -1) {
-    FATAL("Failed creating timerfd file descriptor");
+  if (timer_fd_ == -1) {
+    FATAL1("Failed creating timerfd file descriptor: %i", errno);
   }
   // Register the timer_fd_ with the epoll instance.
   struct epoll_event event;