bind916: Fix build on SmartOS

Do not use priorities attribute as they are not supported
at least on SmartOS with gcc 7.5


(otis)

@@ -1,4 +1,4 @@
-$NetBSD: distinfo,v 1.13 2021/06/02 15:37:06 taca Exp $
+$NetBSD: distinfo,v 1.14 2021/06/04 21:56:50 otis Exp $
 
 SHA1 (bind-9.16.16.tar.xz) = dc37a919ba83674d1ff48558b640907b7a7dd0a7
 RMD160 (bind-9.16.16.tar.xz) = 3e6d92c834b91bd25122278ac6e9f41795040213
@@ -40,6 +40,7 @@
 SHA1 (patch-lib_isc_include_isc_netmgr.h) = 48ac44c6a9b81e6b442deba6c075653d3691464b
 SHA1 (patch-lib_isc_include_isc_socket.h) = dc6376cd9e8391fa96efd805faee1a5d0647a142
 SHA1 (patch-lib_isc_include_isc_types.h) = bc0cdeb762d974b7be6e602b7dc2aac17fa7fe2f
+SHA1 (patch-lib_isc_include_isc_util.h) = 4a3998c2f0c95bffedf2e00b16a9c80475159775
 SHA1 (patch-lib_isc_netmgr_netmgr.c) = 63168c8901646e7b2079e1dc3324087508bb1e62
 SHA1 (patch-lib_isc_rwlock.c) = 1d114248ddee20db7a7429afab446f8b2f0dca82
 SHA1 (patch-lib_isc_stats.c) = 024a372d9919fa751b894f8fc8267691297f00f4

$NetBSD: patch-lib_isc_include_isc_util.h,v 1.1 2021/06/04 21:56:50 otis Exp $

Fix build on SmartOS where priorities are not
supported with gcc 7.5

--- lib/isc/include/isc/util.h.orig	2021-05-12 09:53:16.000000000 +0000
+++ lib/isc/include/isc/util.h
@@ -48,9 +48,12 @@
 #define ISC_NONSTRING
 #endif /* __GNUC__ */
 
-#if HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR && HAVE_FUNC_ATTRIBUTE_DESTRUCTOR
+#if HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR && HAVE_FUNC_ATTRIBUTE_DESTRUCTOR && !defined(__sun)
 #define ISC_CONSTRUCTOR(priority) __attribute__((constructor(priority)))
 #define ISC_DESTRUCTOR(priority)  __attribute__((destructor(priority)))
+#elif defined(__sun)
+#define ISC_CONSTRUCTOR(priority) __attribute__((constructor))
+#define ISC_DESTRUCTOR(priority)  __attribute__((destructor))
 #elif WIN32
 #define ISC_CONSTRUCTOR(priority)
 #define ISC_DESTRUCTOR(priority)