BUG#11754145: Failing test cases. Patch to correct the test case.

mysql-test/include/have_64bit.inc

@@ -2,10 +2,10 @@
 # see also have_32bit.inc
 
 --disable_query_log
-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;
+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 = $save;
 --enable_query_log
 if (!$mach64)
 {