gnulib: update to use its bitsets

[Akim Demaille]

Bison's bitset library was moved into gnulib.

https://lists.gnu.org/archive/html/bug-gnulib/2018-11/msg00045.html

This message does not show the diff for the deleted files,
it's too large, and hardly useful.

commit bcecfbafabe0df5292d91a37cd80f9563b7ca1cb
Author: Akim Demaille <address@hidden>
Date:   Sun Oct 28 18:04:47 2018 +0100

    gnulib: update to use its bitsets
    
    Bison's bitset were moved to gnulib.
    
    * lib/abitset.c, lib/abitset.h, lib/bbitset.h, lib/bitset.c,
    * lib/bitset.h, lib/ebitset.c, lib/ebitset.h, lib/lbitset.c,
    * lib/bitset_stats.c, lib/bitset_stats.h, lib/bitsetv-print.c,
    * lib/bitsetv-print.h, lib/bitsetv.c, lib/bitsetv.h,
    * lib/lbitset.h, lib/vbitset.c, lib/vbitset.h:
    Remove.
    
    * gnulib: Update.
    * bootstrap.conf, lib/local.mk: Adjust.

diff --git a/bootstrap.conf b/bootstrap.conf
index 09af987f..7e9aa1fc 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -18,6 +18,7 @@
 # gnulib modules used by this package.
 gnulib_modules='
   argmatch assert
+  bitsetv
   calloc-posix close closeout config-h c-strcase
   configmake
   dirname
diff --git a/gnulib b/gnulib
index 48a6c46b..b9ca447b 160000
--- a/gnulib
+++ b/gnulib
@@ -1 +1 @@
-Subproject commit 48a6c46b0b7e993aecf5c09386afd554165506ff
+Subproject commit b9ca447bb912cad2fd7aeeda3784aff42f13a336
diff --git a/lib/.gitignore b/lib/.gitignore
index cee8729c..d87696d6 100644
--- a/lib/.gitignore
+++ b/lib/.gitignore
@@ -289,3 +289,20 @@
 /timespec.h
 /xtime.c
 /xtime.h
+/abitset.c
+/abitset.h
+/bbitset.h
+/bitset.c
+/bitset.h
+/ebitset.c
+/ebitset.h
+/lbitset.c
+/lbitset.h
+/vbitset.c
+/vbitset.h
+/bitset_stats.c
+/bitset_stats.h
+/bitsetv-print.c
+/bitsetv-print.h
+/bitsetv.c
+/bitsetv.h
diff --git a/po/POTFILES.in b/po/POTFILES.in
index c56d1b50..06a5cb9e 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -18,7 +18,7 @@ src/scan-skel.l
 src/symtab.c
 
 lib/argmatch.c
-lib/bitset_stats.c
+lib/bitset/stats.c
 lib/closeout.c
 lib/error.c
 lib/getopt.c
diff --git a/src/closure.c b/src/closure.c
index 6729d702..62fe5d07 100644
--- a/src/closure.c
+++ b/src/closure.c
@@ -22,7 +22,6 @@
 #include "system.h"
 
 #include <bitset.h>
-#include <bitsetv-print.h>
 #include <bitsetv.h>
 
 #include "closure.h"
diff --git a/src/main.c b/src/main.c
index 1e2a17ef..ebd92451 100644
--- a/src/main.c
+++ b/src/main.c
@@ -21,8 +21,8 @@
 #include <config.h>
 #include "system.h"
 
-#include <bitset_stats.h>
 #include <bitset.h>
+#include <bitset/stats.h>
 #include <configmake.h>
 #include <progname.h>
 #include <quotearg.h>