[buildbot] phase1: fix bad argument to MasterShellCommand()

[LEDE Commits]

jow pushed a commit to buildbot.git, branch master:
https://git.lede-project.org/8911485994d498e02302c3d474166848b0d894e0

commit 8911485994d498e02302c3d474166848b0d894e0
Author: Jo-Philipp Wich <jo at mein.io>
AuthorDate: Mon Feb 6 14:03:43 2017 +0100

    phase1: fix bad argument to MasterShellCommand()
    
    Signed-off-by: Jo-Philipp Wich <jo at mein.io>
---
 phase1/master.cfg | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/phase1/master.cfg b/phase1/master.cfg
index d7529bd..992e01e 100644
--- a/phase1/master.cfg
+++ b/phase1/master.cfg
@@ -389,7 +389,7 @@ for target in targets:
 		description = "Tagging Git repository",
 		command = [home_dir+'/maketag.sh', '-i', '-k', str(gpg_keyid or ''),
 		           '-p', str(gpg_passfile or ''), '-v', WithProperties("%(tag:-)s")],
-		workdir = home_dir+'/source.git',
+		path = home_dir+'/source.git',
 		env = {'GNUPGHOME': gpg_home},
 		haltOnFailure = True,
 		doStepIf = IsTaggingRequested,