build: support warnings on RHEL 5

Without this, a configure built by autoconf 2.59 was broken when
trying to detect which compiler warning flags were supported.

* .gnulib: Update to latest, for warnings.m4 fix.
* bootstrap.conf: Add fclose explicitly, to match recent gnulib
implicit dependency changes.
* src/qemu/qemu_conf.c (includes): Drop unused include.
* src/uml/uml_conf.c (include): Likewise.
Reported by Daniel P. Berrange.

.gnulib

@@ -1 +1 @@
-Subproject commit a918da4d61d28be61a12605c9d35e2cf3966d866
+Subproject commit 41a7841a82351f9df3e13b6199a134004d694131

bootstrap.conf

@@ -36,6 +36,7 @@ configmake
 count-one-bits
 crypto/md5
 dirname-lgpl
+fclose
 fcntl-h
 ffs
 fnmatch

src/qemu/qemu_conf.c

@@ -46,7 +46,6 @@
 #include "conf.h"
 #include "util.h"
 #include "memory.h"
-#include "verify.h"
 #include "datatypes.h"
 #include "xml.h"
 #include "nodeinfo.h"

src/uml/uml_conf.c

@@ -43,7 +43,6 @@
 #include "util.h"
 #include "memory.h"
 #include "nodeinfo.h"
-#include "verify.h"
 #include "bridge.h"
 #include "logging.h"
 #include "domain_nwfilter.h"