Update gnulib to fix mingw64 compilation errors

.gnulib

@@ -1 +1 @@
-Subproject commit dd6b2d751b3c6ad417f6a4c48f2adb9d27cc59d2
+Subproject commit e9e8aba12af3c903edd422fa036a356c5b2f313a

bootstrap

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Print a version string.
-scriptversion=2012-01-16.17; # UTC
+scriptversion=2012-01-21.16; # UTC
 
 # Bootstrap this package from checked-out sources.
 
@@ -87,9 +87,9 @@ gnulib_files=
 : ${AUTOPOINT=autopoint}
 : ${AUTORECONF=autoreconf}
 
-# A function to be called to edit gnulib.mk right after it's created.
+# A function to be called right after gnulib-tool is run.
 # Override it via your own definition in bootstrap.conf.
-gnulib_mk_hook() { :; }
+bootstrap_post_import_hook() { :; }
 
 # A function to be called after everything else in this script.
 # Override it via your own definition in bootstrap.conf.
@@ -807,6 +807,9 @@ for file in $gnulib_files; do
   symlink_to_dir "$GNULIB_SRCDIR" $file || exit
 done
 
+bootstrap_post_import_hook \
+  || { echo >&2 "$me: bootstrap_post_import_hook failed"; exit 1; }
+
 # Remove any dangling symlink matching "*.m4" or "*.[ch]" in some
 # gnulib-populated directories.  Such .m4 files would cause aclocal to fail.
 # The following requires GNU find 4.2.3 or newer.  Considering the usual
@@ -819,11 +822,16 @@ find "$m4_base" "$source_base" \
   -depth \( -name '*.m4' -o -name '*.[ch]' \) \
   -type l -xtype l -delete > /dev/null 2>&1
 
-# Tell autoreconf not to invoke autopoint or libtoolize; they were run above.
+# Some systems (RHEL 5) are using ancient autotools, for which the
+# --no-recursive option had not been invented.  Detect that lack and
+# omit the option when it's not supported.  FIXME in 2017: remove this
+# hack when RHEL 5 autotools are updated, or when they become irrelevant.
 no_recursive=
 case $($AUTORECONF --help) in
   *--no-recursive*) no_recursive=--no-recursive;;
 esac
+
+# Tell autoreconf not to invoke autopoint or libtoolize; they were run above.
 echo "running: AUTOPOINT=true LIBTOOLIZE=true " \
     "$AUTORECONF --verbose --install $no_recursive -I $m4_base $ACLOCAL_FLAGS"
 AUTOPOINT=true LIBTOOLIZE=true \