GNUmakefile: DL busybox fro mirror (better resp)

Author: oech3

GNUmakefile

@@ -354,8 +354,8 @@ toybox-src:
 busybox-src:
 	if [ ! -e "$(BUSYBOX_SRC)" ] ; then \
 		mkdir -p "$(BUSYBOX_ROOT)" ; \
-		curl -Ls "https://busybox.net/downloads/busybox-$(BUSYBOX_VER).tar.bz2" -o "$(BUSYBOX_ROOT)/$(BUSYBOX_VER).tar.bz2" ; \
-		tar -C "$(BUSYBOX_ROOT)" -xf "$(BUSYBOX_ROOT)/busybox-$(BUSYBOX_VER).tar.bz2" ; \
+		curl -Ls "https://github.com/mirror/busybox/archive/refs/tags/$(subst .,_,$(BUSYBOX_VER)).tar.gz" -o "$(BUSYBOX_ROOT)/busybox-$(BUSYBOX_VER).tar.gz" ; \
+		tar -C "$(BUSYBOX_ROOT)" -xf "$(BUSYBOX_ROOT)/busybox-$(BUSYBOX_VER).tar.gz" ; \
 	fi ;
 
 # This is a busybox-specific config file their test suite wants to parse.