testing/dnssec-tools: Updating config.guess

Fixing FTBFS on ppc64le due to outdate config.guess. Updating it before
compiling.

testing/dnssec-tools/APKBUILD

@@ -17,6 +17,7 @@ builddir="${srcdir}/${pkgname}-${pkgver}"
 prepare() {
 	local pf
 	cd "$builddir"
+	update_config_guess
 	default_prepare
 	sed -e '/^maninstall:/,+3s:$(MKPATH) $(mandir)/$(man1dir):$(MKPATH) $(DESTDIR)/$(mandir)/$(man1dir):' \
 		-i Makefile.in || die