Add missing new-lines at end of file
diff --git a/src/core/iomgr/fd_posix.c b/src/core/iomgr/fd_posix.c
index b31b7b1..e3571e8 100644
--- a/src/core/iomgr/fd_posix.c
+++ b/src/core/iomgr/fd_posix.c
@@ -322,4 +322,4 @@
   set_ready(fd, &fd->writest, allow_synchronous_callback);
 }
 
-#endif
\ No newline at end of file
+#endif