build: update gnulib submodule to latest

* gnulib: Sync recent cleanups and the fix for
missing df entries in the presence of bind mounts:
http://bugs.gnu.org/17833
* NEWS: Detail the df bug fix.

diff --git a/NEWS b/NEWS
index c7f74210cf7c919b66eee6f5fc3becb8e342d91f..f691ab3cb65204741ba6274f6e9e2454d0aea931 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -51,6 +51,11 @@ GNU coreutils NEWS                                    -*- outline -*-
   than error messages or values for the wrong file system.
   [These bugs were present in "the beginning".]
 
+  df now outputs all appropriate entries in the presence of bind mounts.
+  On some systems, entries would have been incorrectly elided due to
+  them being considered "dummy" mounts.
+  [bug introduced in coreutils-8.22]
+
   du now silently ignores directory cycles introduced with bind mounts.
   Previously it would issue a warning and exit with a failure status.
   [bug introduced in coreutils-8.1]

diff --git a/gnulib b/gnulib
index c6e14bbd5d404d147504acdd74c3fd17d5ef1088..71be4c87c8267369f40fbfab7523ab9847154c02 160000 (submodule)
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit c6e14bbd5d404d147504acdd74c3fd17d5ef1088
+Subproject commit 71be4c87c8267369f40fbfab7523ab9847154c02