Fix build with directory-1.3.

See https://github.com/haskell/directory/issues/66

CHANGELOG

@@ -21,6 +21,7 @@ git-annex (6.20161211) UNRELEASED; urgency=medium
     supporting locales such as, en_GB.UTF-8.
   * rekey --force: Incorrectly marked the new key's content as being
     present in the local repo even when it was not.
+  * Fix build with directory-1.3.
 
  -- Joey Hess <id@joeyh.name>  Sun, 11 Dec 2016 21:29:51 -0400
 

Utility/SystemDirectory.hs

@@ -13,4 +13,4 @@ module Utility.SystemDirectory (
 	module System.Directory
 ) where
 
-import System.Directory hiding (isSymbolicLink)
+import System.Directory hiding (isSymbolicLink, getFileSize)

doc/bugs/getFileSize_conflict_between_Utility.Directory_and_Utility.FileSize.mdwn

@@ -31,3 +31,4 @@ import Utility.Directory as X hiding (getFileSize)
 ### Have you had any luck using git-annex before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)
 Yes :)
 
+> [[fixed|done]]; thanks for reporting!