bug#62647: [INSTALL] grep: re-fix Y2038 bug on glibc 2.34+ x86, ARM

[Paul Eggert]

The meaning of AC_SYS_LARGEFILE has changed to no longer even try
to use wider time_t if available.  So use AC_SYS_YEAR2038 as well.
A more-aggressive change would be to use the next Autoconf’s
AC_SYS_YEAR2038_REQUIRED but at least let’s restore the grep 3.8
behavior.
* NEWS: Mention this.
* bootstrap.conf: Add year2038.
---
 NEWS           | 4 ++++
 bootstrap.conf | 1 +
 2 files changed, 5 insertions(+)

diff --git a/NEWS b/NEWS
index 6ebade3..060e938 100644
--- a/NEWS
+++ b/NEWS
@@ -10,6 +10,10 @@ GNU grep NEWS                                    -*- outline 
-*-
   grep 3.8, in that patterns like \w and \b use ASCII rather than
   Unicode interpretations.
 
+  grep no longer fails on files dated after the year 2038,
+  when running on 32-bit x86 and ARM hosts using glibc 2.34+.
+  [bug introduced in grep 3.9]
+
 
 * Noteworthy changes in release 3.10 (2023-03-22) [stable]
 
diff --git a/bootstrap.conf b/bootstrap.conf
index 50948a6..ec48c37 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -102,6 +102,7 @@ windows-stat-inodes
 xalloc
 xbinary-io
 xstrtoimax
+year2038
 '
 gnulib_name=libgreputils
 
-- 
2.37.2