Define in_int32_t_range to check if the 64 bit time_t syscall should be used

Currently glibc uses in_time_t_range to detects time_t overflow,
and if it occurs fallbacks to 64 bit syscall version.

The function name is confusing because internally time_t might be
either 32 bits or 64 bits (depending on __TIMESIZE).

This patch refactors the in_time_t_range by replacing it with
in_int32_t_range for the case to check if the 64 bit time_t syscall
should be used.

The in_time_t range is used to detect overflow of the
syscall return value.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

sysdeps/unix/sysv/linux/clock_settime.c

@@ -41,7 +41,7 @@ __clock_settime64 (clockid_t clock_id, const struct __timespec64 *tp)
   if (ret == 0 || errno != ENOSYS)
     return ret;
 
-  if (! in_time_t_range (tp->tv_sec))
+  if (! in_int32_t_range (tp->tv_sec))
     {
       __set_errno (EOVERFLOW);
       return -1;