MDEV-19387 innodb_ft_result_cache_limit_32 fails on s390x

Fix:
====
1) Combined innodb_ft_result_cache_limit_32.test and
innodb_ft_result_cache_limit_64.test test case in sys_vars suite.

2) Use word_size.inc for combinations of innodb_ft_result_cache_limit test case.

mysql-test/suite/sys_vars/r/innodb_ft_result_cache_limit,32bit.rdiff

+--- mysql-test/suite/sys_vars/r/innodb_ft_result_cache_limit.result	2019-05-07 15:09:57.220599318 +0530
++++ mysql-test/suite/sys_vars/r/innodb_ft_result_cache_limit.reject	2019-05-07 15:10:20.012718538 +0530
+@@ -1,5 +1,7 @@
+ set global innodb_ft_result_cache_limit=5000000000;
++Warnings:
++Warning	1292	Truncated incorrect innodb_ft_result_cache_limit value: '5000000000'
+ select @@innodb_ft_result_cache_limit;
+ @@innodb_ft_result_cache_limit
+-5000000000
++4294967295
+ set global innodb_ft_result_cache_limit=2000000000;

mysql-test/suite/sys_vars/r/innodb_ft_result_cache_limit_32.result

-set global innodb_ft_result_cache_limit=5000000000;
-Warnings:
-Warning	1292	Truncated incorrect innodb_ft_result_cache_limit value: '5000000000'
-select @@innodb_ft_result_cache_limit;
-@@innodb_ft_result_cache_limit
-4294967295
-set global innodb_ft_result_cache_limit=2000000000;

mysql-test/suite/sys_vars/t/innodb_ft_result_cache_limit_32.test → mysql-test/suite/sys_vars/t/innodb_ft_result_cache_limit.test

---source include/have_32bit.inc
+--source include/word_size.inc
 --source include/have_innodb.inc
 
 let $innodb_ft_result_cache_limit_orig=`select @@innodb_ft_result_cache_limit`;

mysql-test/suite/sys_vars/t/innodb_ft_result_cache_limit_64.test

---source include/have_64bit.inc
---source include/have_innodb.inc
-
-let $innodb_ft_result_cache_limit_orig=`select @@innodb_ft_result_cache_limit`;
-
-set global innodb_ft_result_cache_limit=5000000000;
-select @@innodb_ft_result_cache_limit;
-
-eval set global innodb_ft_result_cache_limit=$innodb_ft_result_cache_limit_orig;