archive target added and tested ok

Makefile

@@ -33,4 +33,11 @@ set-resolv:
 tools:
 	$(call vinstall,base-devel git tcc wget vim-x11 tmux)
 
-
+archive:
+	tar -cvpjf void-fs.tar.bz2 \
+	--exclude=./dev/* \
+	--exclude=./proc/* \
+	--exclude=./sys/* \
+	--exclude=./tmp/* \
+	--exclude=./run/* \
+	-C $(MNTDIR) .