[libvirt] [PATCH] build: really fix mingw startup

[Eric Blake]

Aargh; commit 8ae5dfd still didn't fix the mingw problem, because
gnulib defined O_NONBLOCK to 0 for just mingw.  I've now fixed
that in gnulib, but we need the latest pipe2 for libvirt to work.

* .gnulib: Update to latest, for pipe2 fixes.
---

Pushing under the trivial rule (it's a one-liner, right? :)

* .gnulib 9cc9910...4a1579d (5):
  > nonblocking: reduce dependency
  > pipe2: fix O_NONBLOCK support on mingw
  > fcntl-h: fix O_ACCMODE on cygwin
  > pipe-filter: drop O_NONBLOCK workarounds
  > nonblocking: provide O_NONBLOCK for mingw

 .gnulib |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/.gnulib b/.gnulib
index 9cc9910..4a1579d 160000
--- a/.gnulib
+++ b/.gnulib
@@ -1 +1 @@
-Subproject commit 9cc991025d6139a3a8f3e0f1570bf39a66f3aafa
+Subproject commit 4a1579d7560659ef5723325726eda14490a967f6
-- 
1.7.4.2