[buildbot] phase2: --keep-newer-files and --no-overwrite-dir are exclusive

[LEDE Commits]

jow pushed a commit to buildbot.git, branch master:
https://git.lede-project.org/b8c0ac2e1384dbf133a5c1ea479d348ce2a9ee74

commit b8c0ac2e1384dbf133a5c1ea479d348ce2a9ee74
Author: Jo-Philipp Wich <jo at mein.io>
AuthorDate: Fri Jan 27 17:24:31 2017 +0100

    phase2: --keep-newer-files and --no-overwrite-dir are exclusive
    
    Signed-off-by: Jo-Philipp Wich <jo at mein.io>
---
 phase2/master.cfg | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/phase2/master.cfg b/phase2/master.cfg
index bff0b18..20ff19e 100644
--- a/phase2/master.cfg
+++ b/phase2/master.cfg
@@ -278,7 +278,7 @@ for arch in arches:
 	factory.addStep(ShellCommand(
 		name = "unpacksdk",
 		description = "Unpacking SDK archive",
-		command = ["tar", "--keep-newer-files", "--no-overwrite-dir", "--strip-components=1", "-C", "sdk/", "-vxf", "sdk.archive"],
+		command = ["tar", "--keep-newer-files", "--strip-components=1", "-C", "sdk/", "-vxf", "sdk.archive"],
 		haltOnFailure = True))
 
 	factory.addStep(FileDownload(mastersrc=home_dir+'/key-build', slavedest="sdk/key-build", mode=0600))