Use fixed rcache directory when cross-compiling

When cross-compiling, looking at what directories are present on the
build machine makes no sense.  Default to /var/tmp instead.

[ghudson@mit.edu: use /var/tmp instead of /tmp; adjust commit message]

(cherry picked from commit db2acb6)

ticket: 8254
version_fixed: 1.14
status: resolved

src/configure.in

@@ -757,11 +757,15 @@ AC_CHECK_TYPE(time_t, long)
 AC_MSG_CHECKING([for replay cache directory])
 AC_CACHE_VAL(krb5_cv_sys_rcdir,
 [
-for t_dir in /var/tmp /usr/tmp /var/usr/tmp /tmp ; do
-	test -d $t_dir || continue
-	krb5_cv_sys_rcdir=$t_dir
-	break
-done])
+if test $cross_compiling = yes; then
+	krb5_cv_sys_rcdir=/var/tmp
+else
+	for t_dir in /var/tmp /usr/tmp /var/usr/tmp /tmp ; do
+		test -d $t_dir || continue
+		krb5_cv_sys_rcdir=$t_dir
+		break
+	done
+fi])
 AC_MSG_RESULT($krb5_cv_sys_rcdir)
 KRB5_RCTMPDIR=$krb5_cv_sys_rcdir
 AC_SUBST(KRB5_RCTMPDIR)