Update sl container for sl6 to current (build-date=20180201)
@@ -15,4 +15,4 @@ Tags: 6
Architectures: amd64
GitFetch: refs/heads/6
Directory: sl6
-GitCommit: 56b822f43faf72c683cdcd94b31195aa7ec98095
+GitCommit: d2d17b81a784fc91219b6421f15080fb7205eb0d
yosifkit