newer gnulib has rewritten these checks in a way that works for the x32,
and for the targets we care about, these checks won't return false.  so
just drop them to make our life simpler.

https://sites.google.com/site/x32abi/x32-patches

--- findutils-4.4.2/gnulib/lib/getdate.c.x32	2009-05-10 14:23:57.000000000 -0700
+++ findutils-4.4.2/gnulib/lib/getdate.c	2011-12-05 11:41:18.130675712 -0800
@@ -114,7 +114,6 @@
    wraps around, but there's no portable way to check for that at
    compile-time.  */
 verify (TYPE_IS_INTEGER (time_t));
-verify (LONG_MIN <= TYPE_MINIMUM (time_t) && TYPE_MAXIMUM (time_t) <= LONG_MAX);
 
 /* An integer value, and the number of digits in its textual
    representation.  */
--- findutils-4.4.2/gnulib/lib/mktime.c.x32	2009-05-10 14:25:13.000000000 -0700
+++ findutils-4.4.2/gnulib/lib/mktime.c	2011-12-05 11:49:38.368589386 -0800
@@ -166,7 +166,5 @@ ydhms_diff (long int year1, long int yda
 {
   verify (C99_integer_division, -1 / 2 == 0);
-  verify (long_int_year_and_yday_are_wide_enough,
-	  INT_MAX <= LONG_MAX / 2 || TIME_T_MAX <= UINT_MAX);
 
   /* Compute intervening leap days correctly even if year is negative.
      Take care to avoid integer overflow here.  */