merge-recursive::removeFile: remove empty directories

When the last file in a directory is removed as the result of a
merge, try to rmdir the now-empty directory.

Signed-off-by: Junio C Hamano <junkio@cox.net>

git-merge-recursive.py

@@ -293,6 +293,10 @@ def removeFile(clean, path):
         except OSError, e:
             if e.errno != errno.ENOENT and e.errno != errno.EISDIR:
                 raise
+        try:
+            os.removedirs(os.path.dirname(path))
+        except:
+            pass
 
 def uniquePath(path, branch):
     def fileExists(path):