[Buildroot] [git commit] Makefile: release: use .tar.xz instead of .tar.bz2

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=a9bd2b8685ee9cbc6b00e0aa684978fe5f6ca2eb
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master

xz compresses better than bzip2, and is (getting) more popular, so build
release tarballs as .tar.xz (in addition to .tar.gz) instead of .tar.bz2,
similar to how the kernel did ~8 years ago:

https://www.kernel.org/happy-new-year-and-good-bye-bzip2.html

-rw-r--r-- 1 peko peko 5,1M Dec  2 17:55 buildroot-2021.11-rc3.tar.xz
-rw-r--r-- 1 peko peko 5,7M Nov 30 18:15 buildroot-2021.11-rc3.tar.bz2
-rw-r--r-- 1 peko peko 6,8M Nov 30 18:15 buildroot-2021.11-rc3.tar.gz

Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 53f6ae9173..0f84122bd3 100644
--- a/Makefile
+++ b/Makefile
@@ -1210,7 +1210,7 @@ release:
 	$(MAKE) O=$(OUT) distclean
 	tar rf $(OUT).tar $(OUT)
 	gzip -9 -c < $(OUT).tar > $(OUT).tar.gz
-	bzip2 -9 -c < $(OUT).tar > $(OUT).tar.bz2
+	xz -9 -c < $(OUT).tar > $(OUT).tar.xz
 	rm -rf $(OUT) $(OUT).tar
 
 print-version: