Set +x access rules for publish-release.sh

Change-Id: Ia4e16af7975aa399eeb519e3bbd2f5137c25948b
Signed-off-by: Pavel Agapov <pavel.agapov@xored.com>
diff --git a/releng/publish-release.sh b/releng/publish-release.sh
old mode 100644
new mode 100755