Update smmap to a Python 3 compatible version

kevin-brown · kevin-brown · commit 72167492334b · 2014-07-13T14:27:22.000-04:00
diff --git a/gitdb/ext/smmap b/gitdb/ext/smmap
@@ -1 +1 @@
-Subproject commit 616e9ceaf917e4d8f3cf2c145401b8069ce307dd
+Subproject commit 55267119140f3828a24b4986600ed21a1808d6cc
