packages: add loongarch64 directory

add loongarch64 directory similar to riscv
with samba. missing loongarch64 directory and
a package under it will result package build
error:

ERROR: No such file or directory: BASEDIR/README.md

fix: https://github.com/vincentmli/BPFire/issues/71

Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>

make.sh

@@ -2129,6 +2129,7 @@ build_packages() {
 		fi
 
 		pkgs["${path##*/}"]="${path}"
+		#echo "Added to pkgs: ${path##*/} -> ${path}"
 	done
 
 	# Package them all