[libvirt] [PATCH v2] maint: update to latest gnulib

[Eric Blake]

Incorporates fixes for cross-compiling to mingw on rawhide, where
gcc 5.1 changes detection of how to properly determine PRIdMAX.
Also picks up some improvements for compilation on Mac OS X.

* .gnulib: Update to latest, for at least mingw.

Signed-off-by: Eric Blake <eblake at redhat.com>
---

I ended up not pushing the mingw fixes before the release, and now
several other fixes have landed in gnulib.  Pushing now that we are
not in freeze.

* .gnulib 875ec93...f39477d (16):
  > pthread_sigmask: discount system version if a simple macro
  > readlinkat: avoid OS X 10.10 trailing slash bug
  > acl-permissions: Fix build on Mac OS X and older AIX (Bug#20681)
  > acl-permissions: Fix build on Solaris and Cygwin
  > linkat: avoid OS X 10.10 trailing slash with symlink bug
  > unlinkat: handle ignoring of ".." on Darwin 14
  > qacl: split into qcopy-acl and qset-acl
  > gitlog-to-changelog: new option --ignore-line
  > qacl: Reimplement qset_acl and qcopy_acl (Bug#20666)
  > file-has-acl: Split feature tests again (Bug#20667)
  > string: fix build failure on BSD/OSX with FORTIFY_SOURCE
  > stdio: limit __gnu_printf__ witness to gcc 4.4+
  > error: use correct printf attributes on mingw
  > update from texinfo
  > inttypes: force correct mingw PRIdMAX even without <stdio.h>
  > stdio: fix probe on mingw under gcc 5.1

 .gnulib | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.gnulib b/.gnulib
index 875ec93..f39477d 160000
--- a/.gnulib
+++ b/.gnulib
@@ -1 +1 @@
-Subproject commit 875ec93e1501d2d2a8bab1b64fa66b8ceb51dc67
+Subproject commit f39477dba778e99392948dd3dd19ec0d46aee932
-- 
2.4.2