Both mirrors provided in the Makefile only serve gzipped tarballs.
Fixes: #10871
Fixes: 9edfe7dd13d9 ("source: Switch to xz for packages and tools where possible")
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Co-authored-by: Stijn Tintel <stijn@linux-ipv6.be>