Set owners and permissions only after all headers are installed. Add the -P

flag to chown to change the symlinks themselves instead of their targets.
Also change permissions of all symlinks, so they don't depend on the umask
during make build.
ok millert

src/include/Makefile

@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.214 2016/10/16 19:28:44 tb Exp $
+#	$OpenBSD: Makefile,v 1.215 2016/11/08 19:56:56 tb Exp $
 #	$NetBSD: Makefile,v 1.59 1996/05/15 21:36:43 jtc Exp $
 
 #	@(#)Makefile	5.45.1.1 (Berkeley) 5/6/91
@@ -92,15 +92,15 @@ includes:
 		rm -f ${DESTDIR}/usr/include/$$i && \
 		ln -s machine/$$i ${DESTDIR}/usr/include/$$i; \
 	done
-	chown -R ${BINOWN}:${BINGRP} ${DESTDIR}/usr/include
-	find ${DESTDIR}/usr/include -type f -print0 | \
-		xargs -0r chmod a=r
-	find ${DESTDIR}/usr/include -type d -print0 | \
-		xargs -0r chmod u=rwx,go=rx
 	@for i in ${RDIRS}; do \
 		echo installing in ${.CURDIR}/$$i; \
 		cd ${.CURDIR}/$$i && ${RUN_MAKE}; \
 	done
+	chown -RP ${BINOWN}:${BINGRP} ${DESTDIR}/usr/include
+	find ${DESTDIR}/usr/include -type f -print0 | \
+		xargs -0r chmod a=r
+	find ${DESTDIR}/usr/include \( -type d -o -type l \) -print0 | \
+		xargs -0r chmod -h u=rwx,go=rx
 
 copies:
 	@echo copies: ${LDIRS}