Adjust to gnulib changes.

* lib/.cvsignore: Add chdir-long.c, chdir-long.h, memrchr.c,
memrchr.h, openat.c, openat.h.  Remove pathmax.h (added by
mistake, perhaps?), sysexit.h (my typo), xstrdup.c (gnulib removed
this file).  Sort entries.

lib/.cvsignore

@@ -22,10 +22,13 @@ argp-pv.c
 argp-pvh.c
 argp-xinl.c
 argp.h
+asnprintf.c
 backupfile.c
 backupfile.h
 basename.c
 charset.alias
+chdir-long.c
+chdir-long.h
 chown.c
 config.charset
 dirname.c
@@ -75,12 +78,21 @@ localcharset.h
 localedir.h
 mempcpy.c
 mempcpy.h
+memrchr.c
+memrchr.h
 memset.c
+minmax.h
 mktime.c
 modechange.c
 modechange.h
 obstack.c
 obstack.h
+openat.c
+openat.h
+printf-args.c
+printf-args.h
+printf-parse.c
+printf-parse.h
 quote.c
 quote.h
 quotearg.c
@@ -122,7 +134,6 @@ strtoll.c
 strtoul.c
 strtoull.c
 strtoumax.c
-sysexit.h
 sysexit_.h
 sysexits.h
 system.h
@@ -132,25 +143,17 @@ timespec.h
 unlocked-io.h
 unsetenv.c
 utime.c
+vasnprintf.c
+vasnprintf.h
+vsnprintf.c
+vsnprintf.h
 xalloc-die.c
 xalloc.h
 xgetcwd.c
 xgetcwd.h
 xmalloc.c
+xsize.h
 xstrtol.c
 xstrtol.h
 xstrtoul.c
 xstrtoumax.c
-asnprintf.c
-minmax.h
-pathmax.h
-printf-args.c
-printf-args.h
-printf-parse.c
-printf-parse.h
-vasnprintf.c
-vasnprintf.h
-vsnprintf.c
-vsnprintf.h
-xsize.h
-xstrdup.c