maint: update to latest gnulib

Usual update to latest gnulib status.  In particular this update
fixes at least one issue that can be seen in libvirt, by silencing
a valgrind detection of uninitialized memory:
https://bugzilla.redhat.com/show_bug.cgi?id=1174147

* .gnulib: Update to latest.
* bootstrap: Resync to gnulib.
Signed-off-by: NEric Blake <eblake@redhat.com>

.gnulib @ 106a3866

-Subproject commit c27f1a356f2f321daa7f971ef276a1dbfa873bf8
+Subproject commit 106a3866d01f9dd57ab4f10dbeb0d5a8db73a9f7

bootstrap

@@ -915,7 +915,8 @@ if test $use_libtool = 1; then
   esac
 fi
 echo "$0: $gnulib_tool $gnulib_tool_options --import ..."
-$gnulib_tool $gnulib_tool_options --import $gnulib_modules &&
+$gnulib_tool $gnulib_tool_options --import $gnulib_modules \
+  || die "gnulib-tool failed"
 
 for file in $gnulib_files; do
   symlink_to_dir "$GNULIB_SRCDIR" $file \