swi-prolog: rebuild against libressl-2.8

srcpkgs/swi-prolog/template

@@ -1,7 +1,7 @@
 # Template file for 'swi-prolog'
 pkgname=swi-prolog
 version=7.6.4
-revision=3
+revision=4
 wrksrc="swipl-${version}"
 build_style=gnu-configure
 hostmakedepends="pkg-config"
@@ -32,7 +32,7 @@ do_configure() {
 		LDFLAGS+=" -Wl,-z,execstack"
 	esac
 	COFLAGS="${CFLAGS}" ./configure ${configure_args} \
-		--with-world --enable-custom-flags
+		--with-world
 }
 post_install() {
 	chmod +x "${DESTDIR}/usr/lib/swipl-${version}/library/dialect/sicstus/swipl-lfr.pl"