BUG#11754145: One of the test was failing. Patch to fix the test

mysql-test/include/have_32bit.inc

@@ -3,10 +3,10 @@
 
 --disable_query_log
 --disable_warnings
-let $save = `SELECT @@global.sort_buffer_size`;
-SET @@global.sort_buffer_size = 4294967296;
-let $mach32 = `SELECT @@global.sort_buffer_size <= 4294967295`;
-eval SET @@global.sort_buffer_size = $save;
+let $save = `SELECT @@global.myisam_sort_buffer_size`;
+SET @@global.myisam_sort_buffer_size = 4294967296;
+let $mach32 = `SELECT @@global.myisam_sort_buffer_size <= 4294967295`;
+eval SET @@global.myisam_sort_buffer_size = $save;
 --enable_warnings
 --enable_query_log
 if (!$mach32)

mysql-test/include/have_64bit.inc

@@ -2,10 +2,10 @@
 # see also have_32bit.inc
 
 --disable_query_log
-let $save = `SELECT @@session.sort_buffer_size`;
-SET @@session.sort_buffer_size = 4294967296;
-let $mach64 = `SELECT @@session.sort_buffer_size > 4294967295`;
-eval SET @@session.sort_buffer_size = $save;
+let $save = `SELECT @@session.myisam_sort_buffer_size`;
+SET @@session.myisam_sort_buffer_size = 4294967296;
+let $mach64 = `SELECT @@session.myisam_sort_buffer_size > 4294967295`;
+eval SET @@session.myisam_sort_buffer_size = $save;
 --enable_query_log
 if (!$mach64)
 {