$NetBSD: patch-configure,v 1.1 2021/11/20 05:57:29 rin Exp $

Do not clobber LDFLAGS.

--- configure.orig	2018-09-13 22:07:36.000000000 +0900
+++ configure	2021-11-17 19:51:35.412026321 +0900
@@ -3963,8 +3963,6 @@
    linux_pthread="#define LINUX_PTHREAD"
 fi
 
-LDFLAGS=-lpthread
-
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <pthread.h>