build: update to latest gnulib

In particular, pull in gnulib's fix for the broken SIZE_MAX on s390.

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

.gnulib @ 5ddd9d71

-Subproject commit e89b4a7aefce9cb02963920712ba7cdd13641644
+Subproject commit 5ddd9d713d58d6c6d10494a28ceee6988d20ff98

bootstrap

 #! /bin/sh
 # Print a version string.
-scriptversion=2016-01-24.06; # UTC
+scriptversion=2016-11-03.18; # UTC
 
 # Bootstrap this package from checked-out sources.
 
@@ -418,28 +418,30 @@ sort_ver() { # sort -V is not generally available
   done
 }
 
-get_version() {
-  app=$1
+get_version_sed='
+# Move version to start of line.
+s/.*[v ]\([0-9]\)/\1/
 
-  $app --version >/dev/null 2>&1 || { $app --version; return 1; }
+# Skip lines that do not start with version.
+/^[0-9]/!d
 
-  $app --version 2>&1 |
-  sed -n '# Move version to start of line.
-          s/.*[v ]\([0-9]\)/\1/
+# Remove characters after the version.
+s/[^.a-z0-9-].*//
 
-          # Skip lines that do not start with version.
-          /^[0-9]/!d
+# The first component must be digits only.
+s/^\([0-9]*\)[a-z-].*/\1/
 
-          # Remove characters after the version.
-          s/[^.a-z0-9-].*//
+#the following essentially does s/5.005/5.5/
+s/\.0*\([1-9]\)/.\1/g
+p
+q'
 
-          # The first component must be digits only.
-          s/^\([0-9]*\)[a-z-].*/\1/
+get_version() {
+  app=$1
+
+  $app --version >/dev/null 2>&1 || { $app --version; return 1; }
 
-          #the following essentially does s/5.005/5.5/
-          s/\.0*\([1-9]\)/.\1/g
-          p
-          q'
+  $app --version 2>&1 | sed -n "$get_version_sed"
 }
 
 check_versions() {