Mark lang/php/8.1 BROKEN-sparc64

PHP 8.1 needs fibers support which doesn't exist on sparc64. I hope that
will change, but mark it BROKEN-sparc64 in the meantime?

--Kurt

Index: Makefile
===================================================================
RCS file: /cvs/ports/lang/php/8.1/Makefile,v
retrieving revision 1.3
diff -u -p -r1.3 Makefile
--- Makefile 2 Jan 2022 22:59:57 -0000 1.3
+++ Makefile 5 Jan 2022 07:18:20 -0000
@@ -1,5 +1,7 @@
# $OpenBSD: Makefile,v 1.3 2022/01/02 22:59:57 jca Exp $

+BROKEN-sparc64= No fibers support for sparc64
+
PHP_VERSION= 8.1.1
PHP_PKGSPEC= >=8.1,<8.2