main/abuild: enable dt_relr for aarch64 and loongarch64

Supported with binutils 2.43

!70157 (comment 425786)

main/abuild/APKBUILD

@@ -2,7 +2,7 @@
 pkgname=abuild
 pkgver=3.13.0
 _ver=${pkgver%_git*}
-pkgrel=3
+pkgrel=4
 pkgdesc="Script to build Alpine Packages"
 url="https://git.alpinelinux.org/cgit/abuild/"
 arch="all"
@@ -56,7 +56,7 @@ package() {
 	install -m 644 abuild.conf "$pkgdir"/etc/abuild.conf
 
 	case "$CARCH" in
-	x86*|ppc64le)
+	aarch64|loongarch64|x86*|ppc64le)
 		# binutils only supports it here
 		cat >>"$pkgdir"/usr/share/abuild/default.conf <<-EOF