[buildbot] phase2: adjust for .tar.xz packed SDK archives

[LEDE Commits]

jow pushed a commit to buildbot.git, branch master:
https://git.lede-project.org/1993a6fcffc96ca3fadb8f35e0c4fd33c7930dbc

commit 1993a6fcffc96ca3fadb8f35e0c4fd33c7930dbc
Author: Jo-Philipp Wich <jo at mein.io>
AuthorDate: Fri Nov 4 11:43:11 2016 +0100

    phase2: adjust for .tar.xz packed SDK archives
    
    Signed-off-by: Jo-Philipp Wich <jo at mein.io>
---
 phase2/master.cfg | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/phase2/master.cfg b/phase2/master.cfg
index c2c9d9e..8da0318 100644
--- a/phase2/master.cfg
+++ b/phase2/master.cfg
@@ -186,13 +186,13 @@ for arch in arches:
 	factory.addStep(ShellCommand(
 		name = "downloadsdk",
 		description = "Downloading SDK archive",
-		command = ["rsync", "-va", "downloads.lede-project.org::downloads/snapshots/targets/%s/%s/lede-sdk-*.tar.bz2" %(ts[0], ts[1]), "sdk.tar.bz2"],
+		command = ["rsync", "-va", "downloads.lede-project.org::downloads/snapshots/targets/%s/%s/lede-sdk-*.tar.xz" %(ts[0], ts[1]), "sdk.tar.xz"],
 		haltOnFailure = True))
 
 	factory.addStep(ShellCommand(
 		name = "unpacksdk",
 		description = "Unpacking SDK archive",
-		command = ["tar", "--strip-components=1", "-C", "sdk/", "-vxjf", "sdk.tar.bz2"],
+		command = ["tar", "--strip-components=1", "-C", "sdk/", "-vxJf", "sdk.tar.xz"],
 		haltOnFailure = True))
 
 	factory.addStep(FileDownload(mastersrc=home_dir+'/key-build', slavedest="sdk/key-build", mode=0600))